best research articles website

21 Legit Research Databases for Free Journal Articles in 2024

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Written by  Scribendi

Has this ever happened to you? While looking for websites for research, you come across a research paper site that claims to connect academics to a peer-reviewed article database for free.

Intrigued, you search for keywords related to your topic, only to discover that you must pay a hefty subscription fee to access the service. After the umpteenth time being duped, you begin to wonder if there's even such a thing as free journal articles.

Subscription fees and paywalls are often the bane of students and academics, especially those at small institutions who don't provide access to many free article directories and repositories.

Whether you're working on an undergraduate paper, a PhD dissertation, or a medical research study, we want to help you find tools to locate and access the information you need to produce well-researched, compelling, and innovative work.

Below, we discuss why peer-reviewed articles are superior and list out the best free article databases to use in 2024.

Download Our Free Research Database Roundup PDF

Why peer-reviewed scholarly journal articles are more authoritative.

Determining what sources are reliable can be challenging. Peer-reviewed scholarly journal articles are the gold standard in academic research. Reputable academic journals have a rigorous peer-review process.

The peer review process provides accountability to the academic community, as well as to the content of the article. The peer review process involves qualified experts in a specific (often very specific) field performing a review of an article's methods and findings to determine things like quality and credibility.

Peer-reviewed articles can be found in peer-reviewed article databases and research databases, and if you know that a database of journals is reliable, that can offer reassurances about the reliability of a free article. Peer review is often double blind, meaning that the author removes all identifying information and, likewise, does not know the identity of the reviewers. This helps reviewers maintain objectivity and impartiality so as to judge an article based on its merit.

Where to Find Peer-Reviewed Articles

Peer-reviewed articles can be found in a variety of research databases. Below is a list of some of the major databases you can use to find peer-reviewed articles and other sources in disciplines spanning the humanities, sciences, and social sciences.

What Are Open Access Journals?

An open access (OA) journal is a journal whose content can be accessed without payment. This provides scholars, students, and researchers with free journal articles. OA journals use alternate methods of funding to cover publication costs so that articles can be published without having to pass those publication costs on to the reader.

Some of these funding models include standard funding methods like advertising, public funding, and author payment models, where the author pays a fee in order to publish in the journal. There are OA journals that have non-peer-reviewed academic content, as well as journals that focus on dissertations, theses, and papers from conferences, but the main focus of OA is peer-reviewed scholarly journal articles.

The internet has certainly made it easier to access research articles and other scholarly publications without needing access to a university library, and OA takes another step in that direction by removing financial barriers to academic content.

Choosing Wisely

Features of legitimate oa journals.

 There are things to look out for when trying to decide if a free publication journal is legitimate:

Mission statement —The mission statement for an OA journal should be available on their website.

Publication history —Is the journal well established? How long has it been available?

Editorial board —Who are the members of the editorial board, and what are their credentials?

Indexing —Can the journal be found in a reliable database?

Peer review —What is the peer review process? Does the journal allow enough time in the process for a reliable assessment of quality?

Impact factor —What is the average number of times the journal is cited over a two-year period?

Features of Illegitimate OA Journals

There are predatory publications that take advantage of the OA format, and they are something to be wary of. Here are some things to look out for:

Contact information —Is contact information provided? Can it be verified?

Turnaround —If the journal makes dubious claims about the amount of time from submission to publication, it is likely unreliable.

Editorial board —Much like determining legitimacy, looking at the editorial board and their credentials can help determine illegitimacy.

Indexing —Can the journal be found in any scholarly databases?

Peer review —Is there a statement about the peer review process? Does it fit what you know about peer review?

How to Find Scholarly Articles

Identify keywords.

Keywords are included in an article by the author. Keywords are an excellent way to find content relevant to your research topic or area of interest. In academic searches, much like you would on a search engine, you can use keywords to navigate through what is available to find exactly what you're looking for.

Authors provide keywords that will help you easily find their article when researching a related topic, often including general terms to accommodate broader searches, as well as some more specific terms for those with a narrower scope. Keywords can be used individually or in combination to refine your scholarly article search.

Narrow Down Results

Sometimes, search results can be overwhelming, and searching for free articles on a journal database is no exception, but there are multiple ways to narrow down your results. A good place to start is discipline.

What category does your topic fall into (psychology, architecture, machine learning, etc.)? You can also narrow down your search with a year range if you're looking for articles that are more recent.

A Boolean search can be incredibly helpful. This entails including terms like AND between two keywords in your search if you need both keywords to be in your results (or, if you are looking to exclude certain keywords, to exclude these words from the results).

Consider Different Avenues

If you're not having luck using keywords in your search for free articles, you may still be able to find what you're looking for by changing your tactics. Casting a wider net sometimes yields positive results, so it may be helpful to try searching by subject if keywords aren't getting you anywhere.

You can search for a specific publisher to see if they have OA publications in the academic journal database. And, if you know more precisely what you're looking for, you can search for the title of the article or the author's name.

Determining the Credibility of Scholarly Sources

Ensuring that sources are both credible and reliable is crucial to academic research. Use these strategies to help evaluate the usefulness of scholarly sources:

• Peer Review : Look for articles that have undergone a rigorous peer-review process. Peer-reviewed articles are typically vetted by experts in the field, ensuring the accuracy of the research findings.

Tip: To determine whether an article has undergone rigorous peer review, review the journal's editorial policies, which are often available on the journal's website. Look for information about the peer-review process, including the criteria for selecting reviewers, the process for handling conflicts of interest, and any transparency measures in place.

• Publisher Reputation : Consider the reputation of the publisher. Established publishers, such as well-known academic journals, are more likely to adhere to high editorial standards and publishing ethics.
• Author Credentials : Evaluate the credentials and expertise of the authors. Check their affiliations, academic credentials, and past publications to assess their authority in the field.
• Citations and References : Examine the citations and references provided in the article. A well-researched article will cite credible sources to support its arguments and findings. Verify the accuracy of the cited sources and ensure they are from reputable sources.
• Publication Date : Consider the publication date of the article. While older articles may still be relevant, particularly in certain fields, it is best to prioritize recent publications for up-to-date research and findings.
• Journal Impact Factor : Assess the journal's impact factor or other metrics that indicate its influence and reputation within the academic community. Higher impact factor journals are generally considered more prestigious and reliable. 

Tip: Journal Citation Reports (JCR), produced by Clarivate Analytics, is a widely used source for impact factor data. You can access JCR through academic libraries or directly from the Clarivate Analytics website if you have a subscription.

• Peer Recommendations : Seek recommendations from peers, mentors, or professors in your field. They can provide valuable insights and guidance on reputable sources and journals within your area of study.
• Cross-Verification : Cross-verify the information presented in the article with other credible sources. Compare findings, methodologies, and conclusions with similar studies to ensure consistency and reliability.

By employing these strategies, researchers can confidently evaluate the credibility and reliability of scholarly sources, ensuring the integrity of their research contributions in an ever-evolving landscape.

The Top 21 Free Online Journal and Research Databases

Navigating OA journals, research article databases, and academic websites trying to find high-quality sources for your research can really make your head spin. What constitutes a reliable database? What is a useful resource for your discipline and research topic? How can you find and access full-text, peer-reviewed articles?

Fortunately, we're here to help. Having covered some of the ins and outs of peer review, OA journals, and how to search for articles, we have compiled a list of the top 21 free online journals and the best research databases. This list of databases is a great resource to help you navigate the wide world of academic research.

These databases provide a variety of free sources, from abstracts and citations to full-text, peer-reviewed OA journals. With databases covering specific areas of research and interdisciplinary databases that provide a variety of material, these are some of our favorite free databases, and they're totally legit!

CORE is a multidisciplinary aggregator of OA research. CORE has the largest collection of OA articles available. It allows users to search more than 219 million OA articles. While most of these link to the full-text article on the original publisher's site, or to a PDF available for download, five million records are hosted directly on CORE.

CORE's mission statement is a simple and straightforward commitment to offering OA articles to anyone, anywhere in the world. They also host communities that are available for researchers to join and an ambassador community to enhance their services globally. In addition to a straightforward keyword search, CORE offers advanced search options to filter results by publication type, year, language, journal, repository, and author.

CORE's user interface is easy to use and navigate. Search results can be sorted based on relevance or recency, and you can search for relevant content directly from the results screen.

Collection : 219,537,133 OA articles

Other Services : Additional services are available from CORE, with extras that are geared toward researchers, repositories, and businesses. There are tools for accessing raw data, including an API that provides direct access to data, datasets that are available for download, and FastSync for syncing data content from the CORE database.

CORE has a recommender plug-in that suggests relevant OA content in the database while conducting a search and a discovery feature that helps you discover OA versions of paywalled articles. Other features include tools for managing content, such as a dashboard for managing repository output and the Repository Edition service to enhance discoverability.

Good Source of Peer-Reviewed Articles : Yes

Advanced Search Options : Language, author, journal, publisher, repository, DOI, year

2. ScienceOpen

Functioning as a research and publishing network, ScienceOpen offers OA to more than 74 million articles in all areas of science. Although you do need to register to view the full text of articles, registration is free. The advanced search function is highly detailed, allowing you to find exactly the research you're looking for.

The Berlin- and Boston-based company was founded in 2013 to "facilitate open and public communications between academics and to allow ideas to be judged on their merit, regardless of where they come from." Search results can be exported for easy integration with reference management systems.

You can also bookmark articles for later research. There are extensive networking options, including your Science Open profile, a forum for interacting with other researchers, the ability to track your usage and citations, and an interactive bibliography. Users have the ability to review articles and provide their knowledge and insight within the community.

Collection : 74,560,631

Other Services : None

Advanced Search Options :   Content type, source, author, journal, discipline

3. Directory of Open Access Journals

A multidisciplinary, community-curated directory, the Directory of Open Access Journals (DOAJ) gives researchers access to high-quality peer-reviewed journals. It has archived more than two million articles from 17,193 journals, allowing you to either browse by subject or search by keyword.

The site was launched in 2003 with the aim of increasing the visibility of OA scholarly journals online. Content on the site covers subjects from science, to law, to fine arts, and everything in between. DOAJ has a commitment to "increase the visibility, accessibility, reputation, usage and impact of quality, peer-reviewed, OA scholarly research journals globally, regardless of discipline, geography or language."

Information about the journal is available with each search result. Abstracts are also available in a collapsible format directly from the search screen. The scholarly article website is somewhat simple, but it is easy to navigate. There are 16 principles of transparency and best practices in scholarly publishing that clearly outline DOAJ policies and standards.

Collection : 6,817,242

Advanced Search Options :   Subject, journal, year

4. Education Resources Information Center

The Education Resources Information Center (ERIC) of the Institution of Education Sciences allows you to search by topic for material related to the field of education. Links lead to other sites, where you may have to purchase the information, but you can search for full-text articles only. You can also search only peer-reviewed sources.

The service primarily indexes journals, gray literature (such as technical reports, white papers, and government documents), and books. All sources of material on ERIC go through a formal review process prior to being indexed. ERIC's selection policy is available as a PDF on their website.

The ERIC website has an extensive FAQ section to address user questions. This includes categories like general questions, peer review, and ERIC content. There are also tips for advanced searches, as well as general guidance on the best way to search the database. ERIC is an excellent database for content specific to education.

Collection : 1,292,897

Advanced Search Options : Boolean

5. arXiv e-Print Archive

The arXiv e-Print Archive is run by Cornell University Library and curated by volunteer moderators, and it now offers OA to more than one million e-prints.

There are advisory committees for all eight subjects available on the database. With a stated commitment to an "emphasis on openness, collaboration, and scholarship," the arXiv e-Print Archive is an excellent STEM resource.

The interface is not as user-friendly as some of the other databases available, and the website hosts a blog to provide news and updates, but it is otherwise a straightforward math and science resource. There are simple and advanced search options, and, in addition to conducting searches for specific topics and articles, users can browse content by subject. The arXiv e-Print Archive clearly states that they do not peer review the e-prints in the database.

Collection : 1,983,891

Good Source of Peer-Reviewed Articles : No

Advanced Search Options :   Subject, date, title, author, abstract, DOI

6. Social Science Research Network

The Social Science Research Network (SSRN) is a collection of papers from the social sciences community. It is a highly interdisciplinary platform used to search for scholarly articles related to 67 social science topics. SSRN has a variety of research networks for the various topics available through the free scholarly database.

The site offers more than 700,000 abstracts and more than 600,000 full-text papers. There is not yet a specific option to search for only full-text articles, but, because most of the papers on the site are free access, it's not often that you encounter a paywall. There is currently no option to search for only peer-reviewed articles.

You must become a member to use the services, but registration is free and enables you to interact with other scholars around the world. SSRN is "passionately committed to increasing inclusion, diversity and equity in scholarly research," and they encourage and discuss the use of inclusive language in scholarship whenever possible.

Collection : 1,058,739 abstracts; 915,452 articles

Advanced Search Options : Term, author, date, network

7. Public Library of Science

Public Library of Science (PLOS) is a big player in the world of OA science. Publishing 12 OA journals, the nonprofit organization is committed to facilitating openness in academic research. According to the site, "all PLOS content is at the highest possible level of OA, meaning that scientific articles are immediately and freely available to anyone, anywhere."

PLOS outlines four fundamental goals that guide the organization: break boundaries, empower researchers, redefine quality, and open science. All PLOS journals are peer-reviewed, and all 12 journals uphold rigorous ethical standards for research, publication, and scientific reporting.

PLOS does not offer advanced search options. Content is organized by topic into research communities that users can browse through, in addition to options to search for both articles and journals. The PLOS website also has resources for peer reviewers, including guidance on becoming a reviewer and on how to best participate in the peer review process.

Collection : 12 journals

Advanced Search Options : None

8. OpenDOAR

OpenDOAR, or the Directory of Open Access Repositories, is a comprehensive resource for finding free OA journals and articles. Using Google Custom Search, OpenDOAR combs through OA repositories around the world and returns relevant research in all disciplines.

The repositories it searches through are assessed and categorized by OpenDOAR staff to ensure they meet quality standards. Inclusion criteria for the database include requirements for OA content, global access, and categorically appropriate content, in addition to various other quality assurance measures. OpenDOAR has metadata, data, content, preservation, and submission policies for repositories, in addition to two OA policy statements regarding minimum and optimum recommendations.

This database allows users to browse and search repositories, which can then be selected, and articles and data can be accessed from the repository directly. As a repository database, much of the content on the site is geared toward the support of repositories and OA standards.

Collection : 5,768 repositories

Other Services : OpenDOAR offers a variety of additional services. Given the nature of the platform, services are primarily aimed at repositories and institutions, and there is a marked focus on OA in general. Sherpa services are OA archiving tools for authors and institutions.

They also offer various resources for OA support and compliance regarding standards and policies. The publication router matches publications and publishers with appropriate repositories.

There are also services and resources from JISC for repositories for cost management, discoverability, research impact, and interoperability, including ORCID consortium membership information. Additionally, a repository self-assessment tool is available for members.

Advanced Search Options :   Name, organization name, repository type, software name, content type, subject, country, region

9. Bielefeld Academic Search Engine

The Bielefeld Academic Search Engine (BASE) is operated by the Bielefeld University Library in Germany, and it offers more than 240 million documents from more than 8,000 sources. Sixty percent of its content is OA, and you can filter your search accordingly.

BASE has rigorous inclusion requirements for content providers regarding quality and relevance, and they maintain a list of content providers for the sake of transparency, which can be easily found on their website. BASE has a fairly elegant interface. Search results can be organized by author, title, or date.

From the search results, items can be selected and exported, added to favorites, emailed, and searched in Google Scholar. There are basic and advanced search features, with the advanced search offering numerous options for refining search criteria. There is also a feature on the website that saves recent searches without additional steps from the user.

Collection : 276,019,066 documents; 9,286 content providers

Advanced Search Options :   Author, subject, year, content provider, language, document type, access, terms of reuse

10. Digital Library of the Commons Repository

Run by Indiana University, the Digital Library of the Commons (DLC) Repository is a multidisciplinary journal repository that allows users to access thousands of free and OA articles from around the world. You can browse by document type, date, author, title, and more or search for keywords relevant to your topic.

DCL also offers the Comprehensive Bibliography of the Commons, an image database, and a keyword thesaurus for enhanced search parameters. The repository includes books, book chapters, conference papers, journal articles, surveys, theses and dissertations, and working papers. DCL advanced search features drop-down menus of search types with built-in Boolean search options.

Searches can be sorted by relevance, title, date, or submission date in ascending or descending order. Abstracts are included in selected search results, with access to full texts available, and citations can be exported from the same page. Additionally, the image database search includes tips for better search results.

Collection : 10,784

Advanced Search Options :   Author, date, title, subject, sector, region, conference

11. CIA World Factbook

The CIA World Factbook is a little different from the other resources on this list in that it is not an online journal directory or repository. It is, however, a useful free online research database for academics in a variety of disciplines.

All the information is free to access, and it provides facts about every country in the world, which are organized by category and include information about history, geography, transportation, and much more. The World Factbook can be searched by country or region, and there is also information about the world's oceans.

This site contains resources related to the CIA as an organization rather than being a scientific journal database specifically. The site has a user interface that is easy to navigate. The site also provides a section for updates regarding changes to what information is available and how it is organized, making it easier to interact with the information you are searching for.

Collection : 266 countries

12. Paperity

Paperity boasts its status as the "first multidisciplinary aggregator of OA journals and papers." Their focus is on helping you avoid paywalls while connecting you to authoritative research. In addition to providing readers with easy access to thousands of journals, Paperity seeks to help authors reach their audiences and help journals increase their exposure to boost readership.

Paperity has journal articles for every discipline, and the database offers more than a dozen advanced search options, including the length of the paper and the number of authors. There is even an option to include, exclude, or exclusively search gray papers.

Paperity is available for mobile, with both a mobile site and the Paperity Reader, an app that is available for both Android and Apple users. The database is also available on social media. You can interact with Paperity via Twitter and Facebook, and links to their social media are available on their homepage, including their Twitter feed.

Collection : 8,837,396

Advanced Search Options : Title, abstract, journal title, journal ISSN, publisher, year of publication, number of characters, number of authors, DOI, author, affiliation, language, country, region, continent, gray papers

13. dblp Computer Science Bibliography

The dblp Computer Science Bibliography is an online index of major computer science publications. dblp was founded in 1993, though until 2010 it was a university-specific database at the University of Trier in Germany. It is currently maintained by the Schloss Dagstuhl – Leibniz Center for Informatics.

Although it provides access to both OA articles and those behind a paywall, you can limit your search to only OA articles. The site indexes more than three million publications, making it an invaluable resource in the world of computer science. dblp entries are color-coded based on the type of item.

dblp has an extensive FAQ section, so questions that might arise about topics like the database itself, navigating the website, or the data on dblp, in addition to several other topics, are likely to be answered. The website also hosts a blog and has a section devoted to website statistics.

Collection : 5,884,702

14. EconBiz

EconBiz is a great resource for economic and business studies. A service of the Leibniz Information Centre for Economics, it offers access to full texts online, with the option of searching for OA material only. Their literature search is performed across multiple international databases.

EconBiz has an incredibly useful research skills section, with resources such as Guided Walk, a service to help students and researchers navigate searches, evaluate sources, and correctly cite references; the Research Guide EconDesk, a help desk to answer specific questions and provide advice to aid in literature searches; and the Academic Career Kit for what they refer to as Early Career Researchers.

Other helpful resources include personal literature lists, a calendar of events for relevant calls for papers, conferences, and workshops, and an economics terminology thesaurus to help in finding keywords for searches. To stay up-to-date with EconBiz, you can sign up for their newsletter.

Collection : 1,075,219

Advanced Search Options :   Title, subject, author, institution, ISBN/ISSN, journal, publisher, language, OA only

15. BioMed Central

BioMed Central provides OA research from more than 300 peer-reviewed journals. While originally focused on resources related to the physical sciences, math, and engineering, BioMed Central has branched out to include journals that cover a broader range of disciplines, with the aim of providing a single platform that provides OA articles for a variety of research needs. You can browse these journals by subject or title, or you can search all articles for your required keyword.

BioMed Central has a commitment to peer-reviewed sources and to the peer review process itself, continually seeking to help and improve the peer review process. They're "committed to maintaining high standards through full and stringent peer review."

Additionally, the website includes resources to assist and support editors as part of their commitment to providing high-quality, peer-reviewed OA articles.

Collection : 507,212

Other Services : BMC administers the International Standard Randomised Controlled Trial Number (ISRCTN) registry. While initially designed for registering clinical trials, since its creation in 2000, the registry has broadened its scope to include other health studies as well.

The registry is recognized by the International Committee of Medical Journal Editors, as well as the World Health Organization (WHO), and it meets the requirements established by the WHO International Clinical Trials Registry Platform.

The study records included in the registry are all searchable and free to access. The ISRCTN registry "supports transparency in clinical research, helps reduce selective reporting of results and ensures an unbiased and complete evidence base."

Advanced Search Options :   Author, title, journal, list

A multidisciplinary search engine, JURN provides links to various scholarly websites, articles, and journals that are free to access or OA. Covering the fields of the arts, humanities, business, law, nature, science, and medicine, JURN has indexed almost 5,000 repositories to help you find exactly what you're looking for.

Search features are enhanced by Google, but searches are filtered through their index of repositories. JURN seeks to reach a wide audience, with their search engine tailored to researchers from "university lecturers and students seeking a strong search tool for OA content" and "advanced and ambitious students, age 14-18" to "amateur historians and biographers" and "unemployed and retired lecturers."

That being said, JURN is very upfront about its limitations. They admit to not being a good resource for educational studies, social studies, or psychology, and conference archives are generally not included due to frequently unstable URLs.

Collection : 5,064 indexed journals

Other Services : JURN has a browser add-on called UserScript. This add-on allows users to integrate the JURN database directly into Google Search. When performing a search through Google, the add-on creates a link that sends the search directly to JURN CSE. JURN CSE is a search service that is hosted by Google.

Clicking the link from the Google Search bar will run your search through the JURN database from the Google homepage. There is also an interface for a DuckDuckGo search box; while this search engine has an emphasis on user privacy, for smaller sites that may be indexed by JURN, DuckDuckGo may not provide the same depth of results.

Advanced Search Options :   Google search modifiers

Dryad is a digital repository of curated, OA scientific research data. Launched in 2009, it is run by a not-for-profit membership organization, with a community of institutional and publisher members for whom their services have been designed. Members include institutions such as Stanford, UCLA, and Yale, as well as publishers like Oxford University Press and Wiley.

Dryad aims to "promote a world where research data is openly available, integrated with the scholarly literature, and routinely reused to create knowledge." It is free to access for the search and discovery of data. Their user experience is geared toward easy self-depositing, supports Creative Commons licensing, and provides DOIs for all their content.

Note that there is a publishing charge associated if you wish to publish your data in Dryad.  When searching datasets, they are accompanied by author information and abstracts for the associated studies, and citation information is provided for easy attribution.

Collection : 44,458

Advanced Search Options : No

Run by the British Library, the E-Theses Online Service (EThOS) allows you to search over 500,000 doctoral theses in a variety of disciplines. All of the doctoral theses available on EThOS have been awarded by higher education institutions in the United Kingdom.

Although some full texts are behind paywalls, you can limit your search to items available for immediate download, either directly through EThOS or through an institution's website. More than half of the records in the database provide access to full-text theses.

EThOS notes that they do not hold all records for all institutions, but they strive to index as many doctoral theses as possible, and the database is constantly expanding, with approximately 3,000 new records added and 2,000 new full-text theses available every month. The availability of full-text theses is dependent on multiple factors, including their availability in the institutional repository and the level of repository development.

Collection : 500,000+

Advanced Search Options : Abstract, author's first name, author's last name, awarding body, current institution, EThOS ID, year, language, qualifications, research supervisor, sponsor/funder, keyword, title

PubMed is a research platform well-known in the fields of science and medicine. It was created and developed by the National Center for Biotechnology Information (NCBI) at the National Library of Medicine (NLM). It has been available since 1996 and offers access to "more than 33 million citations for biomedical literature from MEDLINE, life science journals, and online books."

While PubMed does not provide full-text articles directly, and many full-text articles may be behind paywalls or require subscriptions to access them, when articles are available from free sources, such as through PubMed Central (PMC), those links are provided with the citations and abstracts that PubMed does provide.

PMC, which was established in 2000 by the NLM, is a free full-text archive that includes more than 6,000,000 records. PubMed records link directly to corresponding PMC results. PMC content is provided by publishers and other content owners, digitization projects, and authors directly.

Collection : 33,000,000+

Advanced Search Options : Author's first name, author's last name, identifier, corporation, date completed, date created, date entered, date modified, date published, MeSH, book, conflict of interest statement, EC/RN number, editor, filter, grant number, page number, pharmacological action, volume, publication type, publisher, secondary source ID, text, title, abstract, transliterated title

20. Semantic Scholar

A unique and easy-to-use resource, Semantic Scholar defines itself not just as a research database but also as a "search and discovery tool." Semantic Scholar harnesses the power of artificial intelligence to efficiently sort through millions of science-related papers based on your search terms.

Through this singular application of machine learning, Semantic Scholar expands search results to include topic overviews based on your search terms, with the option to create an alert for or further explore the topic. It also provides links to related topics.

In addition, search results produce "TLDR" summaries in order to provide concise overviews of articles and enhance your research by helping you to navigate quickly and easily through the available literature to find the most relevant information. According to the site, although some articles are behind paywalls, "the data [they] have for those articles is limited," so you can expect to receive mostly full-text results.

Collection : 203,379,033

Other Services : Semantic Scholar supports multiple popular browsers. Content can be accessed through both mobile and desktop versions of Firefox, Microsoft Edge, Google Chrome, Apple Safari, and Opera.

Additionally, Semantic Scholar provides browser extensions for both Chrome and Firefox, so AI-powered scholarly search results are never more than a click away. The mobile interface includes an option for Semantic Swipe, a new way of interacting with your research results.

There are also beta features that can be accessed as part of the Beta Program, which will provide you with features that are being actively developed and require user feedback for further improvement.

Advanced Search Options : Field of study, date range, publication type, author, journal, conference, PDF

Zenodo, powered by the European Organization for Nuclear Research (CERN), was launched in 2013. Taking its name from Zenodotus, the first librarian of the ancient library of Alexandria, Zenodo is a tool "built and developed by researchers, to ensure that everyone can join in open science." Zenodo accepts all research from every discipline in any file format.

However, Zenodo also curates uploads and promotes peer-reviewed material that is available through OA. A DOI is assigned to everything that is uploaded to Zenodo, making research easily findable and citable. You can sort by keyword, title, journal, and more and download OA documents directly from the site.

While there are closed access and restricted access items in the database, the vast majority of research is OA material. Search results can be filtered by access type, making it easy to view the free articles available in the database.

Collection : 2,220,000+

Advanced Search Options : Access, file type, keywords

Check out our roundup of free research databases as a handy one-page PDF.

How to find peer-reviewed articles.

There are a lot of free scholarly articles available from various sources. The internet is a big place. So how do you go about finding peer-reviewed articles when conducting your research? It's important to make sure you are using reputable sources.

The first source of the article is the person or people who wrote it. Checking out the author can give you some initial insight into how much you can trust what you’re reading. Looking into the publication information of your sources can also indicate whether the article is reliable.

Aspects of the article, such as subject and audience, tone, and format, are other things you can look at when evaluating whether the article you're using is valid, reputable, peer-reviewed material. So, let's break that down into various components so you can assess your research to ensure that you're using quality articles and conducting solid research.

Check the Author

Peer-reviewed articles are written by experts or scholars with experience in the field or discipline they're writing about. The research in a peer-reviewed article has to pass a rigorous evaluation process, so it's a foregone conclusion that the author(s) of a peer-reviewed article should have experience or training related to that research.

When evaluating an article, take a look at the author's information. What credentials does the author have to indicate that their research has scholarly weight behind it? Finding out what type of degree the author has—and what that degree is in—can provide insight into what kind of authority the author is on the subject.

Something else that might lend credence to the author's scholarly role is their professional affiliation. A look at what organization or institution they are affiliated with can tell you a lot about their experience or expertise. Where were they trained, and who is verifying their research?

Identify Subject and Audience

The ultimate goal of a study is to answer a question. Scholarly articles are also written for scholarly audiences, especially articles that have gone through the peer review process. This means that the author is trying to reach experts, researchers, academics, and students in the field or topic the research is based on.

Think about the question the author is trying to answer by conducting this research, why, and for whom. What is the subject of the article? What question has it set out to answer? What is the purpose of finding the information? Is the purpose of the article of importance to other scholars? Is it original content?

Research should also be approached analytically. Is the methodology sound? Is the author using an analytical approach to evaluate the data that they have obtained? Are the conclusions they've reached substantiated by their data and analysis? Answering these questions can reveal a lot about the article's validity.

Format Matters

Reliable articles from peer-reviewed sources have certain format elements to be aware of. The first is an abstract. An abstract is a short summary or overview of the article. Does the article have an abstract? It's unlikely that you're reading a peer-reviewed article if it doesn't. Peer-reviewed journals will also have a word count range. If an article seems far too short or incredibly long, that may be reason to doubt it.

Another feature of reliable articles is the sections the information is divided into. Peer-reviewed research articles will have clear, concise sections that appropriately organize the information. This might include a literature review, methodology, results (in the case of research articles), and a conclusion.

One of the most important sections is the references or bibliography. This is where the researcher lists all the sources of their information. A peer-reviewed source will have a comprehensive reference section.

An article that has been written to reach an academic community will have an academic tone. The language that is used, and the way this language is used, is important to consider. If the article is riddled with grammatical errors, confusing syntax, and casual language, it almost definitely didn't make it through the peer review process.

Also consider the use of terminology. Every discipline is going to have standard terminology or jargon that can be used and understood by other academics in the discipline. The language in a peer-reviewed article is going to reflect that.

If the author is going out of their way to explain simple terms, or terms that are standard to the field or discipline, it's unlikely that the article has been peer reviewed, as this is something that the author would be asked to address during the review process.

Publication

The source of the article will be a very good indicator of the likelihood that it was peer reviewed. Where was the article published? Was it published alongside other academic articles in the same discipline? Is it a legitimate and reputable scholarly publication?

A trade publication or newspaper might be legitimate or reputable, but it is not a scholarly source, and it will not have been subject to the peer review process. Scholarly journals are the best resource for peer-reviewed articles, but it's important to remember that not all scholarly journals are peer reviewed.

It's helpful to look at a scholarly source's website, as peer-reviewed journals will have a clear indication of the peer review process. University libraries, institutional repositories, and reliable databases (and now you have a list of legit ones) can also help provide insight into whether an article comes from a peer-reviewed journal.

Common Research Mistakes to Avoid

Research is a lot of work. Even with high standards and good intentions, it's easy to make mistakes. Perhaps you searched for access to scientific journals for free and found the perfect peer-reviewed sources, but you forgot to document everything, and your references are a mess. Or, you only searched for free online articles and missed out on a ground-breaking study that was behind a paywall.

Whether your research is for a degree or to get published or to satisfy your own inquisitive nature, or all of the above, you want all that work to produce quality results. You want your research to be thorough and accurate.

To have any hope of contributing to the literature on your research topic, your results need to be high quality. You might not be able to avoid every potential mistake, but here are some that are both common and easy to avoid.

Sticking to One Source

One of the hallmarks of good research is a healthy reference section. Using a variety of sources gives you a better answer to your question. Even if all of the literature is in agreement, looking at various aspects of the topic may provide you with an entirely different picture than you would have if you looked at your research question from only one angle.

Not Documenting Every Fact

As you conduct your research, do yourself a favor and write everything down. Everything you include in your paper or article that you got from another source is going to need to be added to your references and cited.

It's important, especially if your aim is to conduct ethical, high-quality research, that all of your research has proper attribution. If you don't document as you go, you could end up making a lot of work for yourself if the information you don't write down is something that later, as you write your paper, you really need.

Using Outdated Materials

Academia is an ever-changing landscape. What was true in your academic discipline or area of research ten years ago may have since been disproven. If fifteen studies have come out since the article that you're using was published, it's more than a little likely that you're going to be basing your research on flawed or dated information.

If the information you're basing your research on isn't as up-to-date as possible, your research won't be of quality or able to stand up to any amount of scrutiny. You don't want all of your hard work to be for naught.

Relying Solely on Open Access Journals

OA is a great resource for conducting academic research. There are high-quality journal articles available through OA, and that can be very helpful for your research. But, just because you have access to free articles, that doesn't mean that there's nothing to be found behind a paywall.

Just as dismissing high-quality peer-reviewed articles because they are OA would be limiting, not exploring any paid content at all is equally short-sighted. If you're seeking to conduct thorough and comprehensive research, exploring all of your options for quality sources is going to be to your benefit.

Digging Too Deep or Not Deep Enough

Research is an art form, and it involves a delicate balance of information. If you conduct your research using only broad search terms, you won't be able to answer your research question well, or you'll find that your research provides information that is closely related to your topic but, ultimately, your findings are vague and unsubstantiated.

On the other hand, if you delve deeply into your research topic with specific searches and turn up too many sources, you might have a lot of information that is adjacent to your topic but without focus and perhaps not entirely relevant. It's important to answer your research question concisely but thoroughly.

Different Types of Scholarly Articles

Different types of scholarly articles have different purposes. An original research article, also called an empirical article, is the product of a study or an experiment. This type of article seeks to answer a question or fill a gap in the existing literature.

Research articles will have a methodology, results, and a discussion of the findings of the experiment or research and typically a conclusion.

Review articles overview the current literature and research and provide a summary of what the existing research indicates or has concluded. This type of study will have a section for the literature review, as well as a discussion of the findings of that review. Review articles will have a particularly extensive reference or bibliography section.

Theoretical articles draw on existing literature to create new theories or conclusions, or look at current theories from a different perspective, to contribute to the foundational knowledge of the field of study.

10 Tips for Navigating Journal Databases

Use the right academic journal database for your search, be that interdisciplinary or specific to your field. Or both!

If it's an option, set the search results to return only peer-reviewed sources.

Start by using search terms that are relevant to your topic without being overly specific.

Try synonyms, especially if your keywords aren't returning the desired results.

Even if you've found some good articles, try searching using different terms.

Explore the advanced search features of the database(s).

Learn to use Booleans (AND, OR, NOT) to expand or narrow your results.

Once you've gotten some good results from a more general search, try narrowing your search.

Read through abstracts when trying to find articles relevant to your research.

Keep track of your research and use citation tools. It'll make life easier when it comes time to compile your references.

7 Frequently Asked Questions

1. how do i get articles for free.

Free articles can be found through free online academic journals, OA databases, or other databases that include OA journals and articles. These resources allow you to access free papers online so you can conduct your research without getting stuck behind a paywall.

Academics don't receive payment for the articles they contribute to journals. There are often, in fact, publication fees that scholars pay in order to publish. This is one of the funding structures that allows OA journals to provide free content so that you don't have to pay fees or subscription costs to access journal articles.

2. How Do I Find Journal Articles?

Journal articles can be found in databases and institutional repositories that can be accessed at university libraries. However, online research databases that contain OA articles are the best resource for getting free access to journal articles that are available online.

Peer-reviewed journal articles are the best to use for academic research, and there are a number of databases where you can find peer-reviewed OA journal articles. Once you've found a useful article, you can look through the references for the articles the author used to conduct their research, and you can then search online databases for those articles, too.

3. How Do I Find Peer-Reviewed Articles?

Peer-reviewed articles can be found in reputable scholarly peer-reviewed journals. High-quality journals and journal articles can be found online using academic search engines and free research databases. These resources are excellent for finding OA articles, including peer-reviewed articles.

OA articles are articles that can be accessed for free. While some scholarly search engines and databases include articles that aren't peer reviewed, there are also some that provide only peer-reviewed articles, and databases that include non-peer-reviewed articles often have advanced search features that enable you to select "peer review only." The database will return results that are exclusively peer-reviewed content.

4. What Are Research Databases?

A research database is a list of journals, articles, datasets, and/or abstracts that allows you to easily search for scholarly and academic resources and conduct research online. There are databases that are interdisciplinary and cover a variety of topics.

For example, Paperity might be a great resource for a chemist as well as a linguist, and there are databases that are more specific to a certain field. So, while ERIC might be one of the best educational databases available for OA content, it's not going to be one of the best databases for finding research in the field of microbiology.

5. How Do I Find Scholarly Articles for Specific Fields?

There are interdisciplinary research databases that provide articles in a variety of fields, as well as research databases that provide articles that cater to specific disciplines. Additionally, a journal repository or index can be a helpful resource for finding articles in a specific field.

When searching an interdisciplinary database, there are frequently advanced search features that allow you to narrow the search results down so that they are specific to your field. Selecting "psychology" in the advanced search features will return psychology journal articles in your search results. You can also try databases that are specific to your field.

If you're searching for law journal articles, many law reviews are OA. If you don't know of any databases specific to history, visiting a journal repository or index and searching "history academic journals" can return a list of journals specific to history and provide you with a place to begin your research.

6. Are Peer-Reviewed Articles Really More Legitimate?

The short answer is yes, peer-reviewed articles are more legitimate resources for academic research. The peer review process provides legitimacy, as it is a rigorous review of the content of an article that is performed by scholars and academics who are experts in their field of study. The review provides an evaluation of the quality and credibility of the article.

Non-peer-reviewed articles are not subject to a review process and do not undergo the same level of scrutiny. This means that non-peer-reviewed articles are unlikely, or at least not as likely, to meet the same standards that peer-reviewed articles do.

7. Are Free Article Directories Legitimate?

Yes! As with anything, some databases are going to be better for certain requirements than others. But, a scholarly article database being free is not a reason in itself to question its legitimacy.

Free scholarly article databases can provide access to abstracts, scholarly article websites, journal repositories, and high-quality peer-reviewed journal articles. The internet has a lot of information, and it's often challenging to figure out what information is reliable. 

Research databases and article directories are great resources to help you conduct your research. Our list of the best research paper websites is sure to provide you with sources that are totally legit.

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The top list of academic research databases

2. Web of Science

5. ieee xplore, 6. sciencedirect, 7. directory of open access journals (doaj), get the most out of your academic research database, frequently asked questions about academic research databases, related articles.

Whether you are writing a thesis , dissertation, or research paper it is a key task to survey prior literature and research findings. More likely than not, you will be looking for trusted resources, most likely peer-reviewed research articles.

Academic research databases make it easy to locate the literature you are looking for. We have compiled the top list of trusted academic resources to help you get started with your research:

Scopus is one of the two big commercial, bibliographic databases that cover scholarly literature from almost any discipline. Besides searching for research articles, Scopus also provides academic journal rankings, author profiles, and an h-index calculator .

• Coverage: 90.6 million core records
• References: N/A
• Discipline: Multidisciplinary
• Access options: Limited free preview, full access by institutional subscription only
• Provider: Elsevier

Web of Science also known as Web of Knowledge is the second big bibliographic database. Usually, academic institutions provide either access to Web of Science or Scopus on their campus network for free.

• Coverage: approx. 100 million items
• References: 1.4 billion
• Access options: institutional subscription only
• Provider: Clarivate (formerly Thomson Reuters)

PubMed is the number one resource for anyone looking for literature in medicine or biological sciences. PubMed stores abstracts and bibliographic details of more than 30 million papers and provides full text links to the publisher sites or links to the free PDF on PubMed Central (PMC) .

• Coverage: approx. 35 million items
• Discipline: Medicine and Biological Sciences
• Access options: free
• Provider: NIH

For education sciences, ERIC is the number one destination. ERIC stands for Education Resources Information Center, and is a database that specifically hosts education-related literature.

• Coverage: approx. 1.6 million items
• Discipline: Education
• Provider: U.S. Department of Education

IEEE Xplore is the leading academic database in the field of engineering and computer science. It's not only journal articles, but also conference papers, standards and books that can be search for.

• Coverage: approx. 6 million items
• Discipline: Engineering
• Provider: IEEE (Institute of Electrical and Electronics Engineers)

ScienceDirect is the gateway to the millions of academic articles published by Elsevier, 1.4 million of which are open access. Journals and books can be searched via a single interface.

• Coverage: approx. 19.5 million items

The DOAJ is an open-access academic database that can be accessed and searched for free.

• Coverage: over 8 million records
• Provider: DOAJ

JSTOR is another great resource to find research papers. Any article published before 1924 in the United States is available for free and JSTOR also offers scholarships for independent researchers.

• Coverage: more than 12 million items
• Provider: ITHAKA

Start using a reference manager like Paperpile to save, organize, and cite your references. Paperpile integrates with PubMed and many popular databases, so you can save references and PDFs directly to your library using the Paperpile buttons:

Scopus is one of the two big commercial, bibliographic databases that cover scholarly literature from almost any discipline. Beside searching for research articles, Scopus also provides academic journal rankings, author profiles, and an h-index calculator .

PubMed is the number one resource for anyone looking for literature in medicine or biological sciences. PubMed stores abstracts and bibliographic details of more than 30 million papers and provides full text links to the publisher sites or links to the free PDF on PubMed Central (PMC)

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100 Best Websites to Find Research Articles, Papers & Journals

In the vast landscape of digital information, access to credible academic resources is indispensable for the curious mind. Navigating through a myriad of websites to find scholarly journals, articles, and books can be a daunting task. To aid in this quest for knowledge, we’ve curated a list of the top 100 websites renowned for their repository of academic treasures . These platforms serve as indispensable tools for researchers, students, and enthusiasts seeking reputable and diverse scholarly materials. From comprehensive databases to user-friendly interfaces, each website stands as a testament to the democratization of education and the evolution of digital learning.

Join us on this expedition through the virtual libraries that serve as gateways to a world of intellectual richness and exploration.

1. Google Scholar

As a widely-used academic search engine, Google Scholar provides access to scholarly articles, theses, books, and conference papers across various disciplines. Its user-friendly interface allows researchers to explore a vast database of scholarly literature, offering citations, abstracts, and sometimes even full-text access. Its citation tracking feature enables scholars to follow research trends and connect with related publications. With its comprehensive coverage and indexing of academic sources, Google Scholar is an indispensable tool for academics, students, and researchers seeking reliable and diverse scholarly content.

2. ScienceDirect

ScienceDirect is a comprehensive platform offering access to a vast collection of academic journals, articles, and books across various scientific disciplines. With a user-friendly interface, it provides researchers and students with a plethora of scholarly resources in fields like science, technology, medicine, and social sciences. ScienceDirect grants access to a multitude of peer-reviewed journals, research articles, book chapters, and reference works. Its advanced search functionalities and intuitive navigation streamline the process of locating relevant literature for academic pursuits.

3. ReaserchGate

As a prominent academic networking platform, ResearchGate fosters collaboration among researchers globally. Offering access to a vast repository of academic journals, articles, and books across disciplines, it serves as a hub for scholarly communication. Researchers can connect, share findings, and access a diverse range of publications, facilitating knowledge exchange and collaborative efforts in advancing scientific endeavors.

4. Springerlink

SpringerLink stands as a prominent platform for accessing academic journals, books, and reference works across disciplines such as science, technology, medicine, and the social sciences. Offering a vast collection of peer-reviewed content from renowned publishers, SpringerLink provides access to high-quality research articles, book chapters, and reference materials. Its user-friendly interface facilitates easy navigation and searchability, making it a valuable resource for scholars, researchers, and students seeking in-depth academic literature and cutting-edge research in various fields.

VET-Bib serves as a specialized repository for veterinary science-related literature, catering to professionals, researchers, and students in the field. This platform offers a curated collection of academic journals, articles, and books specific to veterinary medicine, animal health, and related disciplines. VET-Bib facilitates access to a diverse range of scholarly resources, including research papers, clinical studies, textbooks, and reports, contributing significantly to advancements in veterinary sciences.

6. Academia.edu

Academia.edu is a social networking platform designed for academics to share and access scholarly papers, articles, and research. It allows researchers to create profiles, upload their work, and connect with peers worldwide, fostering collaboration and knowledge exchange. Users can explore a wide range of academic disciplines, access papers, follow scholars, and track research interests. Academia.edu serves as a hub for disseminating research, accessing scholarly content, and networking within the academic community.

7. arXiv.org e-Print Archive

arXiv.org is a preprint repository primarily focused on physics, mathematics, computer science, quantitative biology, quantitative finance, and statistics. It hosts a vast collection of research papers, providing early access to cutting-edge findings before formal publication. Researchers worldwide contribute to arXiv, sharing their work and enabling the dissemination of crucial discoveries within these disciplines. Its open-access nature encourages collaboration, facilitates rapid dissemination of research, and serves as a vital resource for scholars and students alike.

8. Astrophysics Data System

The Astrophysics Data System (ADS) stands as an authoritative digital library providing access to a wealth of literature in astrophysics, astronomy, and related sciences. ADS serves as a comprehensive platform offering academic journals, articles, conference proceedings, and data sets relevant to the field. Its sophisticated search tools enable researchers to explore astronomical literature, access preprints, and gather valuable resources for their scholarly inquiries.

9. Google Books

Google Books offers an extensive and diverse collection of digitized books, providing access to a wide range of academic literature across multiple disciplines. While not exclusively academic, Google Books encompasses a significant repository of scholarly works, allowing users to preview, purchase, or access full texts of books relevant to their research. Its search feature allows users to explore content, view excerpts, and locate academic publications, making it a valuable resource for scholars, researchers, and students.

10. ProQuest

An extensive digital library offering access to a vast array of scholarly journals, articles, and books across multiple disciplines. ProQuest’s user-friendly platform facilitates research, providing comprehensive resources for academics, researchers, and students worldwide. With diverse content, including historical archives, current publications, and multimedia resources, it’s a go-to destination for in-depth exploration and reliable sources.

11. Education Resources Information Center (ERIC)

ERIC is a comprehensive platform offering an array of educational resources, research articles, and publications. It specializes in curating scholarly content related to education, spanning diverse topics from early childhood to higher education. ERIC acts as a centralized hub for educators, researchers, and policymakers, providing access to peer-reviewed articles, reports, and conference papers. With its extensive database, ERIC facilitates exploration and dissemination of knowledge, fostering advancements in educational practices and policies.

12. Microsoft Academic Search

Microsoft Academic Search is a dynamic platform dedicated to facilitating academic exploration and research discovery. Leveraging advanced algorithms and vast data sets, it offers a user-friendly interface to access scholarly articles, publications, and citations across various disciplines. This tool provides in-depth search functionalities, citation analysis, and semantic understanding, empowering researchers to navigate through a plethora of academic resources. Microsoft Academic Search encourages collaboration, knowledge sharing, and innovative scholarly pursuits by offering a robust platform for academic exploration.

13. Oxford Academic Journals Search

Oxford Academic Journals Search is a prestigious repository hosting a wide spectrum of scholarly articles and publications across multiple disciplines. Renowned for its high-quality content and authoritative contributions, it serves as a gateway to scholarly excellence. This platform offers access to esteemed journals published by Oxford University Press, encompassing diverse fields such as humanities, social sciences, science, and medicine. With its rigorous peer-review process and rich historical archive, Oxford Academic Journals Search fosters academic inquiry, knowledge dissemination, and intellectual discourse.

JSTOR is a revered digital library providing access to an extensive collection of academic journals, books, and primary sources. Catering to researchers, students, and scholars worldwide, JSTOR archives scholarly content across various disciplines, including arts, humanities, social sciences, and sciences. Known for its archival depth and user-friendly interface, JSTOR grants access to a wealth of peer-reviewed articles, books, and research materials. Its comprehensive database and interdisciplinary approach facilitate scholarly research, critical analysis, and the exploration of historical and contemporary academic literature. JSTOR remains a vital resource for academic pursuits and intellectual discovery.

15. Behavioral and Brain Sciences

Behavioral and Brain Sciences is a prestigious academic journal that publishes target articles and commentary on significant and controversial topics in psychology, neuroscience, cognitive science, and related fields. Recognized for its unique format, BBS publishes comprehensive articles accompanied by multiple commentaries from experts in the field, fostering in-depth discussions and debates on key issues. This journal serves as a platform for rigorous scientific discourse, shaping the direction of research and theory development in behavioral and brain sciences.

16. PubChem

Operated by the NCBI, PubChem stands as an extensive chemical database, offering insights into compound properties, structures, and biological activities. Its collection includes scientific articles, journals, and books relevant to chemistry, pharmacology, and life sciences. Researchers benefit from its comprehensive information on chemical compounds, aiding in drug discovery, bioinformatics, and chemical research.

PubMed serves as a comprehensive resource for accessing biomedical literature. With millions of articles from various fields like medicine, biology, and health sciences, it provides researchers, healthcare professionals, and students with a vast repository of peer-reviewed articles. Its user-friendly interface allows easy navigation through research articles, clinical studies, and reviews, making it an invaluable tool for staying updated on the latest advancements in healthcare and life sciences.

18. CiteSeerX

CiteSxeerX project is funded by the National Science Foundation, is a public integrated digital library, database, and search engine for scientific papers in chemistry. The goal of this project is to develop an intelligent search and database that provides easy access to relevant data for diverse community of users who need for chemical information.

19. Semantic Scholar

Semantic Scholar is an academic search engine that utilizes artificial intelligence methods to provide highly relevant results for journal articles. It is designed to quickly highlight the most important papers and identify the connections between them. It currently includes on computer science and biomedical publications.

20. Web of Science

Web of Science is an online subscription-based scientific citation indexing service that provides a comprehensive citation search. It gives access to multiple databases that reference cross-disciplinary research allowing in-depth exploration of specialized sub-fields within an academic or scientific discipline.

21. Analytical Abstracts

Analytical Abstracts is a literature updating service that keeps researchers and students informed of the latest developments in analytical science. It includes details of the most relevant literature presented as individual records that are easily searchable by analyte, matrix, technique and subject area.

22. Merck Index

The Merck Index is a revered compendium of chemical compounds, providing in-depth information on their properties, structures, and uses. Widely used by chemists, researchers, and students, it offers a wealth of data on chemicals, drugs, and biological substances. With over 11,000 monographs featuring precise details, including synthesis pathways and safety information, it remains an indispensable reference for understanding and researching chemical compounds and their applications.

23. MedlinePlus

MedlinePlus is an online information service created by the United States National Library of Medicine. The service provides curated consumer health information and brings together information from the National Library of Medicine, the National Institutes of Health, other U.S. government agencies, and health-related organizations.

24. Agricola

Agricola is a bibliographic database of citations to the agricultural literature created by the National Agricultural Library. The database indexes a wide variety of publications covering agriculture and its allied fields, including, animal and veterinary sciences, entomology, plant sciences, forestry, aquaculture, fisheries, and many more.

25. AGRIS: Agricultural Database

AGRIS is a global public domain database with more than 8 million structured bibliographical records on agricultural science and technology. The AGRIS Search system allows scientists, researchers to perform sophisticated searches using keywords, journal titles or names of countries, institutions, and authors.

26. WorldCat

WorldCat stands as a vast catalog of library collections worldwide, encompassing books, journals, multimedia materials, and more. It facilitates access to resources held in numerous libraries globally, allowing users to locate and borrow items beyond their local collection. Its extensive database aids researchers, scholars, and enthusiasts in discovering a broad range of academic resources, fostering collaborative research and access to diverse perspectives across various subjects and disciplines.

27. IOPscience

IOPscience serves as a leading platform for accessing scientific content in physics, engineering, and related disciplines. Hosting journals, conference proceedings, and magazines published by the Institute of Physics, it offers a trove of high-quality research articles, reviews, and cutting-edge studies. Researchers and academics benefit from its authoritative content, advanced search features, and access to vital information shaping the forefront of scientific exploration and technological advancements.

28. PLOS ONE

PLOS ONE stands as an open-access, peer-reviewed journal publishing multidisciplinary scientific research. It houses a vast repository of articles across various scientific disciplines, fostering accessibility and collaboration within the academic community. Known for its rigorous review process and commitment to transparency, PLOS ONE promotes diverse research findings and encourages innovation in scientific exploration.

A comprehensive abstract and citation database catering to scientific, technical, medical, and social sciences. Scopus offers access to an extensive collection of peer-reviewed literature, providing researchers and institutions with powerful tools for tracking, analyzing, and visualizing research trends and data. Its vast coverage and analytical features make it a vital resource in the academic community.

30. Advanced Technologies & Aerospace Database

The Advanced Technologies & Aerospace Database provides extensive coverage of advanced technology literature. It features over 26 million A&I records and more than 250 full-text titles that date back to 1962. Its topics cover aeronautics, communications, computer and IT, electronics, lasers, space sciences, telecommunications and many more.

31. Air University Library Index to Military Periodicals (AULIMP)

AULIMP specializes in curating military-centric literature, indexing journals, periodicals, and articles vital to military studies and defense. Catering to scholars, military personnel, and historians, it provides a wealth of resources covering military history, strategy, technology, and policy analysis, aiding in comprehensive research within the defense domain.

32. ACM Digital Library

Geared towards computing professionals, the ACM Digital Library hosts an extensive collection of journals, conference proceedings, and books in computer science and related fields. It offers a rich repository of cutting-edge research, enabling access to pivotal works and fostering innovation and advancement in the realm of technology and computing.

33. Project MUSE

Project MUSE offers a comprehensive digital collection of scholarly journals and books in humanities and social sciences. Recognized for its extensive coverage and user-friendly interface, it provides access to high-quality content from reputable publishers and institutions worldwide. With a focus on academic excellence, Project MUSE supports research, learning, and intellectual discovery.

34. Ulrich’s Periodicals Directory

Ulrich’s Periodicals Directory serves as an authoritative resource for information on academic journals, magazines, and other periodicals. It offers detailed bibliographic data, including publication details, peer-review status, and indexing information. Widely used by researchers, librarians, and institutions, Ulrich’s facilitates the identification and evaluation of publications, aiding in academic research and scholarly communication.

35. OAIster Database

OAIster functions as a global aggregator, collating digital resources from diverse libraries worldwide. With access to academic content spanning journals, theses, and books sourced from various repositories and institutions, it provides a comprehensive search platform across disciplines, aiding researchers in accessing a wide array of scholarly materials.

36. Beilstein Database

A renowned resource in organic chemistry, Beilstein Database aggregates exhaustive data on organic compounds, providing critical information on their properties, reactions, and synthesis methods. Researchers access a plethora of peer-reviewed articles, journals, and books, empowering scientific exploration and innovation in chemical research and development.

37. Mendeley

Mendeley, a reference manager and academic social network, empowers researchers to organize, annotate, and collaborate on research papers and articles. Its user-friendly platform enables citation management, document sharing, and networking among scholars globally. With integrated features for discovery and collaboration, Mendeley streamlines the research process and supports scholarly communication.

38. Chinese Social Science Citation Index

Chinese Social Sciences Citation Index (CSSCI) is an interdisciplinary citation index program in China. This citation database covers more than 500 Chinese academic journals of humanities and social sciences. Many Chinese universities and institutes use CSSCI as a basis for the evaluation of academic achievements and promotion.

39. Library of Congress

The Library of Congress offers an extensive collection of academic journals, articles, and books spanning diverse disciplines. As the largest library in the world, it provides access to unparalleled resources, including historical manuscripts, government publications, and research materials. With a vast digital repository, users can delve into scholarly literature, research papers, and educational resources, making it an indispensable hub for academic pursuits.

40. CiNii Articles

As a comprehensive Japanese academic database, CiNii Articles houses a diverse collection of scholarly articles, theses, and research papers spanning multiple disciplines. Drawing from Japanese academic institutions, it facilitates cross-disciplinary research, serving as a valuable resource for global knowledge dissemination.

41. PsycINFO

PsycINFO, curated by the American Psychological Association (APA), is a comprehensive database encompassing literature in psychology and related disciplines. It indexes scholarly journals, books, conference proceedings, and other resources, providing access to psychological research, behavioral sciences, and mental health literature. With its extensive coverage of peer-reviewed content, PsycINFO aids researchers, psychologists, educators, and students in accessing credible and relevant information, enabling informed analysis and understanding within the realm of psychology and associated fields.

42. Tisch Library – Journals and Articles

Tisch Library serves as a central academic resource hub at Tufts University, providing access to a vast collection of scholarly materials, including books, journals, databases, and multimedia resources. With expert librarians offering guidance and support, Tisch Library facilitates research and learning, offering access to diverse information sources and fostering a conducive environment for academic exploration.

43. OpenEdition.org

OpenEdition.org is a digital publishing platform dedicated to the humanities and social sciences. Hosting journals, books, and research content, it promotes open access to scholarly resources, fostering interdisciplinary dialogue and knowledge dissemination. With a commitment to free access and innovative publishing models, OpenEdition.org facilitates academic exchange and contributes to the democratization of knowledge.

44. Digital Library Of The Commons Repository (DLC)

DLC is a comprehensive resource housing academic works on the commons, including scholarly articles, theses, and research papers. It curates a vast collection focused on topics like environmental studies, economics, and social sciences. Users access a wealth of resources supporting interdisciplinary research on communal resources, governance, and sustainability.

45. Arts & Humanities Citation Index

The Arts & Humanities Citation Index is a citation index, with abstracting and indexing for more than 1,700 arts and humanities journals, and coverage of disciplines that includes social and natural science journals. Its subjects cover arts, humanities, language, poetry, music, classical works, history, philosophy, architecture, religion, and many more.

46. Science Citation Index

An esteemed bibliographic database, Science Citation Index, meticulously indexes scientific literature across various disciplines. It enables researchers to navigate and explore scholarly articles based on citation connections, facilitating robust literature reviews and comprehensive insights into academic trends and advancements.

47. EurekaMag Biomedical Library

Focused on the biomedical field, EurekaMag offers an extensive repository of research articles, journals, and publications. Specializing in biological and medical sciences, this library provides a wealth of knowledge for professionals, researchers, and students. Its curated collection spans diverse subfields, offering valuable insights and updates within the biomedical domain.

48. CERN Document Server (CDS)

The CERN Document Server is the institutional repository that provides acquisition, search and collaborative tools to manage collections of documents produced at CERN. This includes HEP documents, multimedia documents, bulletins, administrative documents, EU project documents and many more.

49. Open Library

Open Library stands as a digital repository, granting free access to an impressive array of academic journals, articles, and books. Its open-source platform enables users to explore a wide spectrum of scholarly content, fostering global access to educational resources. With a user-friendly interface, it supports research endeavors by offering a comprehensive collection of materials, ranging from classic literature to contemporary academic publications.

50. Ei Compendex

A pivotal resource for engineers, Ei Compendex boasts an extensive engineering database comprising journals, conference proceedings, and articles. Covering a wide array of engineering disciplines such as mechanical, civil, and electrical engineering, it serves as a gateway to cutting-edge research and advancements in the field.

Embase stands as a pivotal repository for biomedical research, housing a wide array of peer-reviewed journals, conference abstracts, and articles. Specializing in pharmacology, toxicology, and clinical medicine, it aids medical professionals and researchers in accessing crucial information for evidence-based practice and scientific exploration.

52. IEEE Xplore

A paramount platform for engineering and technology, IEEE Xplore is a treasure trove of research papers, conference proceedings, and technical articles. It hosts a plethora of resources spanning electrical engineering, computer science, and related fields, fostering innovation and knowledge dissemination among professionals and academia.

53. Social Science Research Network (SSRN)

SSRN serves as a leading platform for social sciences, offering a vast repository of preprints, working papers, and published articles. Embracing disciplines like economics, law, and humanities, SSRN facilitates scholarly collaboration and dissemination, fostering discussions and advancements in social science research.

54. The World Factbook – CIA

The World Factbook offers information on the people, history, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities. It provides maps of the major world regions, flags of the World, political maps of the World, world oceans map as well as standard time zones of the world map.

55. Europe PMC

A comprehensive platform for accessing biomedical literature, Europe PMC hosts a vast repository of academic journals, articles, and books. It offers a user-friendly interface, allowing researchers to explore a wealth of scientific content, including full-text articles, abstracts, and research papers across various disciplines within the life sciences. With powerful search capabilities and access to funding information, Europe PMC facilitates efficient navigation through a diverse collection, supporting scholars, scientists, and healthcare professionals in their quest for credible and relevant academic resources.

56. National Diet Library

Serving as Japan’s national library, the National Diet Library provides a rich assortment of academic journals, articles, and books, reflecting the country’s cultural and scholarly heritage. It encompasses an extensive collection of publications, archives, and digital resources, catering not only to researchers and scholars but also to the general public. With its emphasis on Japanese history, culture, and scholarly works, the library offers a valuable repository, fostering academic exploration and knowledge dissemination on a national scale.

57. DBLP Computer Science Bibliography

Renowned in the field of computer science, DBLP stands as a comprehensive bibliographic database, meticulously curating academic journals, articles, and books within the realm of computing. Its meticulous indexing covers a wide array of topics, including algorithms, artificial intelligence, and software engineering. Researchers benefit from its organized and structured platform, facilitating easy access to authoritative publications, conference proceedings, and scholarly contributions, making it an indispensable resource for the computer science community worldwide.

58. National Archives Catalog

As a treasure trove of historical records and government documents, the National Archives Catalog preserves the rich tapestry of the United States’ history. It serves as a gateway to a vast collection of academic journals, articles, and books, encompassing an extensive range of topics spanning politics, culture, and society. With its user-friendly interface and comprehensive search functionalities, researchers, historians, and the public can delve into primary sources, manuscripts, and official records, unraveling the nation’s past and shaping contemporary understanding.

59. University of Guelph Library

The University of Guelph Library stands as a comprehensive repository, offering an extensive collection of books, journals, and articles across diverse disciplines. It caters to the research and academic needs of students, faculty, and scholars, fostering a conducive environment for learning, exploration, and scholarly pursuits.

60. Chemical Abstracts Service (CAS)

CAS is an online source of chemical information that provides many tools such as SciFinder and tagged keywords, summaries, indexes of disclosures and structures of compounds in recently published scientific documents. CAS has over 8,000 journals, technical reports, dissertations, conference proceedings available in different languages.

61. Scientific Information Database (SID)

SID serves as an Iranian digital repository housing scholarly journals, articles, and theses across various domains. It plays a pivotal role in disseminating scientific knowledge, enabling research collaboration and providing access to valuable academic content within Iran and globally, fostering innovation and academic growth.

A leading aggregator of open-access research content, CORE collates millions of academic journals, articles, and books from various repositories and repositories globally. It offers a centralized platform, facilitating seamless access to diverse scholarly publications across multiple disciplines. Emphasizing open access, CORE champions unrestricted availability to research literature, providing researchers and students with a valuable resource for discovering scholarly works, enhancing academic exploration, and fostering collaboration. With its expansive collection and user-friendly interface, CORE stands as an essential tool for accessing credible and diverse academic resources.

63. Research Papers in Economics (RePEc)

RePEc is a collaborative effort of hundreds of volunteers to enhance the dissemination of research in economics and related sciences. The heart of the project is a decentralized bibliographic database of working papers, journal articles, books, books chapters and software components, all maintained by volunteers.

64. Book Review Index Online

Offering a comprehensive collection of book reviews, this platform serves as a valuable resource for scholars and book enthusiasts. Users gain access to extensive critiques spanning various genres and subjects, aiding in informed decision-making for academic pursuits or leisure reading. Its indexed reviews enable efficient searches and critical assessments, providing a nuanced understanding of literary works and their scholarly reception.

65. IngentaConnect

IngentaConnect provides online articles from over 30000 publications. Abstracts are free; full text is available by subscription or pay-per-view. The site is ideal for publishers looking to put their content online for the first time and increase the global visibility of their publications.

66. ASCE Library

ASCE Library is an online civil engineering database that provides the contents of peer-reviewed journals, proceedings, e-books, and standards published by the American Society of Civil Engineers. It offers free access to abstracts of academic journal articles, proceedings papers, e-books, standards, etc.

67. National Bureau of Economic Research (NBER)

Renowned for its pivotal role in economic research, NBER is a hub for high-quality academic papers and data-driven analysis. Catering to economists and policymakers, it disseminates groundbreaking research on diverse economic facets. The site offers access to a wealth of working papers, economic indicators, and conferences, fostering collaboration and innovation in the field.

Tailored for researchers in science and engineering, Inspec is an indispensable database hosting a vast collection of peer-reviewed articles, conference proceedings, and patents. Its meticulously curated content covers an array of disciplines, providing in-depth insights and cutting-edge information crucial for technological advancements and academic pursuits.

69. INSPIRE-HEP

INSPIRE-HEP is an open access digital library for the field of high energy physics. In addition to scientific papers, It provides other information like citation metrics, plots extracted from papers or internal experiment notes and tools for users to improve metadata.

70. MathSciNet Mathematical Reviews

MathSciNet is a fully searchable database with many tools designed to help navigate the mathematical sciences literature. It serves researchers and scholars in the mathematical sciences by providing peer-reviewed articles and books.

71. African Journals Online (AJOL)

AJOL is the world’s largest online library of peer-reviewed, African-published scholarly journals. With AJOL, you can browse peer-reviewed journals from Africa and download full text articles. Articles can be searched by title, authors or keywords.

72. Directory of Open Access Journals (DOAJ)

A champion of open access, DOAJ serves as a goldmine for scholarly literature, housing a wide spectrum of peer-reviewed journals across disciplines. By promoting unrestricted access to quality research, it empowers academics worldwide. Its stringent criteria ensure credibility, fostering transparency and democratizing knowledge dissemination.

73. JournalTOCs

Aiming to streamline academic research, JournalTOCs aggregates tables of contents from thousands of scholarly journals. This platform facilitates swift access to the latest articles, aiding researchers in staying updated within their areas of interest. Its user-friendly interface and customizable alerts enable efficient navigation through a plethora of scholarly content, optimizing the research process.

74. AcademicJournals.org

AcademicJournals.org is a broad-based open access publisher. It provides free access to research information to the international community without financial, legal or technical barriers. All the journals from this organization will be freely distributed and available from multiple websites.

75. Library Genesis (LibGen)

A controversial yet immensely popular platform, LibGen hosts an extensive catalog of academic texts, journals, and books. Known for its extensive collection and accessibility, LibGen is a resource for individuals seeking academic materials that might not be readily available through traditional channels. It has gained traction as a resource for users worldwide due to its broad range of content.

76. PhilPapers.org

PhilPapers.org is a comprehensive index and bibliography of philosophy maintained by the community of philosophers. It’s an online source of research content in philosophy, including journals, books, open access archives, and personal pages maintained by academics.

77. SciELO.org

SciELO hosts a vast collection of academic journals primarily from Latin America, Spain, Portugal, and other Ibero-American regions. It’s a rich resource for accessing scholarly articles in various disciplines, offering open access to high-quality research, fostering knowledge sharing, and promoting regional academic excellence.

78. EBSCO Information Services

EBSCO is a comprehensive platform providing access to a wide array of scholarly journals, articles, and books across multiple disciplines. With its user-friendly interface and robust search capabilities, it’s a go-to resource for researchers, libraries, and institutions globally, offering diverse content and valuable research tools.

79. Econlit

EconLit, a premier resource for economics research, curates a comprehensive database of scholarly journals, articles, and books in the field. Tailored for economists, researchers, and students, it encompasses a vast array of economic literature, including peer-reviewed articles, working papers, and conference proceedings. Its specialized focus ensures in-depth coverage of economic theories, trends, and analyses, serving as an indispensable tool for those immersed in economic studies and research.

80. State Legislative Websites Directory

This online database contains information gleaned from the websites of the 50 state legislatures, the District of Columbia and the territories. You can select to view specific website content materials such as, bills, press rooms, statutes from any states.

81. Information Bridge: Department of Energy Scientific and Technical Information

The Information Bridge serves as a hub for the Department of Energy’s vast scientific and technical knowledge repository. It houses a comprehensive collection of academic journals, articles, and books, focusing on energy-related research. Researchers and academics access cutting-edge information on various energy disciplines, from renewable energy to nuclear physics, aiding in scholarly pursuits and industry advancements.

82. BioOne Complete

BioOne Complete is a specialized database catering to the life sciences, environmental studies, and related fields. It curates a collection of high-impact scholarly journals and research articles, facilitating access to cutting-edge biological research and ecological studies.

83. Civil Engineering Database

CEDB is a free bibliographic database for all ASCE publications including journals, conference proceedings, books, standards, manuals, magazines, and newspapers on all the disciplines of civil engineering. The coverage dates back to 1872.

84. LessonPlanet

LessonPlanet serves educators by offering a vast repository of lesson plans, teaching resources, and educational materials. It’s an invaluable tool for teachers, providing curated content to enhance classroom instruction and streamline lesson planning across various subjects and grade levels.

85. CiteULike

CiteULike is a free online service that allows users to save and share citations to academic papers. Based on the principle of social bookmarking, the site works to promote and to develop the sharing of scientific references amongst researchers.

86. Science.gov

Science.gov acts as a centralized gateway to authoritative scientific information sourced from multiple U.S. government agencies. It aggregates a wide spectrum of academic journals, articles, and books across scientific domains. This resource facilitates comprehensive searches, empowering researchers with reliable scientific data and publications crucial for academic research and evidence-based decision-making.

87. Cochrane Library

Cochrane Library is renowned for its systematic reviews and evidence-based healthcare research. It’s a crucial resource for medical professionals and researchers, offering comprehensive reviews that inform healthcare decisions and practices worldwide.

88. CAB Abstracts – CABI

CAB Abstracts is an English-language bibliographic information online service that provides access to the world’s applied life sciences literature. It comes with CABI Full Text, giving users automatic access to over 410,000 journal articles, conference papers and reports.

Zenodo is an open-access repository for scientific research data, enabling researchers to store, share, and explore datasets across disciplines. It promotes collaboration, transparency, and accessibility in scientific research, fostering innovation and knowledge exchange within the global research community.

90. Archives Hub

Archives Hub serves as a gateway to historical archives in the UK, offering access to a wealth of primary sources. It consolidates descriptions of archives held in various institutions, facilitating academic research. Through detailed records, researchers explore diverse topics spanning arts, humanities, and social sciences. The platform enables users to locate specific materials, aiding in comprehensive and in-depth investigations. Archives Hub stands as a vital resource for scholars delving into historical records, fostering a deeper understanding of past events and societal evolution.

91. OpenStax

Dedicated to advancing access to education, OpenStax offers free, peer-reviewed, and openly licensed textbooks. As an initiative aiming to alleviate the financial burden of education, OpenStax provides quality academic resources across various subjects. With a mission to make learning more accessible, it supports educators and learners globally by offering high-quality educational materials at no cost.

92. Bioline Internationl

Bioline International stands as a prominent platform offering open-access scholarly resources in the life sciences. Hosting a vast repository of peer-reviewed journals from developing countries, it promotes global access to valuable research. With a focus on biodiversity, environment, and healthcare, Bioline International facilitates the dissemination of cutting-edge scientific knowledge. Its diverse collection empowers researchers, students, and practitioners worldwide, fostering collaboration and advancing scientific discovery in crucial fields.

93. WorldWideScience

WorldWideScience serves as a global platform, aggregating scientific content from various countries and international organizations. It offers access to an extensive repository of academic journals, articles, and books, transcending geographical barriers. Researchers benefit from diverse perspectives and a wealth of information, fostering collaboration and knowledge exchange on an international scale.

94. Dimensions.ai

Dimensions.ai is an innovative research platform revolutionizing academic exploration. It integrates a vast array of scholarly resources, including articles, datasets, grants, and patents, offering a comprehensive view of research landscapes. Using sophisticated analytics and visualization tools, it assists researchers in uncovering connections, trends, and emerging areas of study. Dimensions.ai facilitates efficient literature searches, empowering scholars to navigate the expansive realm of academia and make informed contributions to their fields.

95. Ethnologue

Ethnologue is an annual reference publication in print and online that provides statistics and other information on the living languages of the world. It contains information on over 7000 languages including the number of speakers, locations, dialects, linguistic affiliations, autonyms, etc.

96. Taylor & Francis Online

Taylor & Francis Online hosts a vast collection of academic journals, articles, and books across various disciplines. With a user-friendly interface, it offers extensive resources in fields like science, humanities, social sciences, and more. Researchers benefit from comprehensive search tools, robust citation metrics, and access to cutting-edge research.

97. Zentralblatt MATH

Zentralblatt MATH serves as a comprehensive database for mathematical literature, covering a broad spectrum of mathematical research. With its extensive collection of abstracts and reviews, it provides valuable insights into mathematical publications worldwide. Researchers benefit from its indexing of mathematical articles, enabling efficient access to critical information, fostering collaboration, and supporting advancements in the field of mathematics.

98. PubMed Central

PubMed Central, a free digital repository, is a treasure trove of biomedical and life sciences literature. Hosting a vast archive of peer-reviewed articles, PubMed Central is a go-to platform for researchers, healthcare professionals, and students. Its comprehensive database encompasses a myriad of topics, facilitating easy access to authoritative information and fostering advancements in healthcare and life sciences.

99. EconBiz

EconBiz stands as a crucial resource for economists and social scientists, offering access to economic literature, research, and information. It aggregates a diverse range of publications, including articles, working papers, and research papers, facilitating comprehensive research in economics and related disciplines. EconBiz empowers users with efficient search functionalities, access to full-text documents, and information on events and job opportunities, fostering a vibrant academic community in the field of economics.

100. RefSeek – Academic Search Engine

RefSeek is a powerful academic search engine that scours the internet for scholarly resources. It indexes millions of documents, including articles, books, encyclopedias, and journals, ensuring a wide breadth of sources for researchers. With its user-friendly interface and advanced search capabilities, RefSeek streamlines the process of locating credible and authoritative information across various disciplines. It prioritizes academic content, making it an indispensable tool for students, scholars, and educators in their quest for reliable and relevant research materials.

101. Bielefeld Academic Search Engine (BASE)

BASE functions as a robust academic search engine, scouring the web for scholarly resources, including journals, articles, and books. It indexes content from various repositories, providing a user-friendly interface for researchers worldwide. With a focus on open access materials, BASE enhances accessibility to academic literature, supporting scholarly investigations across multiple disciplines.

102. JournalSeek

JournalSeek operates as a comprehensive database for academic journals, offering easy access to scholarly publications. It catalogs journals from diverse disciplines, allowing users to discover relevant articles and research papers. Researchers benefit from a user-friendly interface, streamlined search capabilities, and detailed journal information, facilitating efficient academic exploration and literature reviews.

Click here for more academic databases and search engines .

Remember, while these platforms offer valuable resources, access to some content may require institutional subscriptions or payment. Additionally, it’s essential to verify the credibility and peer-reviewed status of the sources before citing them in academic work.

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The Best Research and Reference Websites

Where to look when you need information

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Research websites come in handy in all kinds of situations, whether you're looking for the average rainfall in the Amazon rainforest, researching Roman history, or just having fun learning to find information.

This list of the best research websites will help greatly, and most of them are updated daily with new information.

I like to pair these sites with free research organizational tools to keep track of everything I gather online.

Best Research Websites

• Library of Congress : LOC.gov lets you not only ask a librarian for help , but also search catalogs of libraries from all over the world. This is truly a huge resource that should be on your Top 10 best research sites list. Anything from Academia Sinica in Taiwan to Yale University in the U.S. is here and ready to be searched.
• ReferenceDesk.org : Dubbed "The Internet's Best Reference Source," this extremely useful web directory provides everything from business and finance information to federal government resources, scholarship details, links to newspapers and calendars, search engines, and more.
• Ask the Space Expert: NASA's source for space and science research help. Use the video links to listen to questions answered by experts. These are from 2013 through 2015.
• USA.gov : This is where you should start when looking for specific U.S. government information. Learn about the country in general or education, housing, disability services, jobs, taxes, laws, and more.
• Reference.com : Extremely simple to use with a basic layout, this reference website lets you browse by category or search by keywords to research everything from food and health to history, beauty, education, technology, vehicles, art, and more.
• Refdesk.com : Billing itself as the internet's fact-checker, this site includes in-depth research links to breaking news, editorials, Today in History, Word of the Day, and other references.
• Encyclopedia.com : The #1 online encyclopedia that lets you search over 200 reference books and encyclopedias at once. The Picks of the week is a neat section to examine each week.
• Encyclopedia Britannica : One of the world's oldest encyclopedias online; has featured posts and category listings. The company launched in the 18th century and has been publishing exclusively online since 2011.
• Purdue University Quick Reference : This site has tons of information that includes resources specific to Purdue University and surrounding areas in Indiana. It also includes an Ask a Librarian service.
• Prescriber's Digital Reference : A wonderful research tool when gathering detailed medical information. The drug name browser includes summaries (dosage, description, and more) for hundreds of drugs.
• iTools.com : Serves as a gateway for reference and research links. It uses other websites for its searches, like YouTube and Google.
• ResearchGate : Scientific knowledge from over 160 million publication pages; browse topics in categories like engineering, biology, climate change, medicine, math, and more.
• Baseball-Reference.com : Here's everything you ever wanted to know about baseball.
• FOLDOC : Free Online Dictionary of Computing is a detailed computing dictionary for researching the meaning behind computer-related tools, standards, jargon, languages, and more. The "random" button is a fun way to learn new concepts.

Depending on the type of research you're doing or how you need to reference the information, you may need quick access to books. There are lots of places to find free book downloads , textbooks , and educational movies .

Other Ways to Do Research

Search engines like Google are a great way to perform online research. You can locate books, articles, interviews, and lots more. Learn how to search better to get the most out of your research.

Another top source of expert information is your local librarian— search for libraries near you at WorldCat . Librarians are trained to find answers to obscure questions, they're friendly, and best of all, you can talk with them face to face. They often ask you questions you might not have considered, leading to even better results. You can get help from librarians online, too, through some of the sources above.

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70 years after brown v. board of education, new research shows rise in school segregation.

As the nation prepares to mark the 70th anniversary of the landmark U.S. Supreme Court ruling in Brown v. Board of Education , a new report from researchers at Stanford and USC shows that racial and economic segregation among schools has grown steadily in large school districts over the past three decades — an increase that appears to be driven in part by policies favoring school choice over integration.

Analyzing data from U.S. public schools going back to 1967, the researchers found that segregation between white and Black students has increased by 64 percent since 1988 in the 100 largest districts, and segregation by economic status has increased by about 50 percent since 1991.

The report also provides new evidence about the forces driving recent trends in school segregation, showing that the expansion of charter schools has played a major role.  

The findings were released on May 6 with the launch of the Segregation Explorer , a new interactive website from the Educational Opportunity Project at Stanford University. The website provides searchable data on racial and economic school segregation in U.S. states, counties, metropolitan areas, and school districts from 1991 to 2022. 

“School segregation levels are not at pre- Brown levels, but they are high and have been rising steadily since the late 1980s,” said Sean Reardon , the Professor of Poverty and Inequality in Education at Stanford Graduate School of Education and faculty director of the Educational Opportunity Project. “In most large districts, school segregation has increased while residential segregation and racial economic inequality have declined, and our findings indicate that policy choices – not demographic changes – are driving the increase.” 

“There’s a tendency to attribute segregation in schools to segregation in neighborhoods,” said Ann Owens , a professor of sociology and public policy at USC. “But we’re finding that the story is more complicated than that.”

Assessing the rise

In the Brown v. Board decision issued on May 17, 1954, the U.S. Supreme Court ruled that racially segregated public schools violated the Equal Protection Clause of the Fourteenth Amendment and established that “separate but equal” schools were not only inherently unequal but unconstitutional. The ruling paved the way for future decisions that led to rapid school desegregation in many school districts in the late 1960s and early 1970s.

Though segregation in most school districts is much lower than it was 60 years ago, the researchers found that over the past three decades, both racial and economic segregation in large districts increased. Much of the increase in economic segregation since 1991, measured by segregation between students eligible and ineligible for free lunch, occurred in the last 15 years.

White-Hispanic and white-Asian segregation, while lower on average than white-Black segregation, have both more than doubled in large school districts since the 1980s. 

Racial-economic segregation – specifically the difference in the proportion of free-lunch-eligible students between the average white and Black or Hispanic student’s schools – has increased by 70 percent since 1991. 

School segregation is strongly associated with achievement gaps between racial and ethnic groups, especially the rate at which achievement gaps widen during school, the researchers said.  

“Segregation appears to shape educational outcomes because it concentrates Black and Hispanic students in higher-poverty schools, which results in unequal learning opportunities,” said Reardon, who is also a senior fellow at the Stanford Institute for Economic Policy Research and a faculty affiliate of the Stanford Accelerator for Learning . 

Policies shaping recent trends 

The recent rise in school segregation appears to be the direct result of educational policy and legal decisions, the researchers said. 

Both residential segregation and racial disparities in income declined between 1990 and 2020 in most large school districts. “Had nothing else changed, that trend would have led to lower school segregation,” said Owens. 

But since 1991, roughly two-thirds of districts that were under court-ordered desegregation have been released from court oversight. Meanwhile, since 1998, the charter sector – a form of expanded school choice – has grown.

Expanding school choice could influence segregation levels in different ways: If families sought schools that were more diverse than the ones available in their neighborhood, it could reduce segregation. But the researchers found that in districts where the charter sector expanded most rapidly in the 2000s and 2010s, segregation grew the most. 

The researchers’ analysis also quantified the extent to which the release from court orders accounted for the rise in school segregation. They found that, together, the release from court oversight and the expansion of choice accounted entirely for the rise in school segregation from 2000 to 2019.

The researchers noted enrollment policies that school districts can implement to mitigate segregation, such as voluntary integration programs, socioeconomic-based student assignment policies, and school choice policies that affirmatively promote integration. 

“School segregation levels are high, troubling, and rising in large districts,” said Reardon. “These findings should sound an alarm for educators and policymakers.”

Additional collaborators on the project include Demetra Kalogrides, Thalia Tom, and Heewon Jang. This research, including the development of the Segregation Explorer data and website, was supported by the Russell Sage Foundation, the Robert Wood Johnson Foundation, and the Bill and Melinda Gates Foundation.   

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New treatment could reverse hair loss caused by an autoimmune skin disease

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Images for download on the MIT News office website are made available to non-commercial entities, press and the general public under a Creative Commons Attribution Non-Commercial No Derivatives license . You may not alter the images provided, other than to crop them to size. A credit line must be used when reproducing images; if one is not provided below, credit the images to "MIT."

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Researchers at MIT, Brigham and Women’s Hospital, and Harvard Medical School have developed a potential new treatment for alopecia areata, an autoimmune disorder that causes hair loss and affects people of all ages, including children.

For most patients with this type of hair loss, there is no effective treatment. The team developed a microneedle patch that can be painlessly applied to the scalp and releases drugs that help to rebalance the immune response at the site, halting the autoimmune attack.

In a study of mice, the researchers found that this treatment allowed hair to regrow and dramatically reduced inflammation at the treatment site, while avoiding systemic immune effects elsewhere in the body. This strategy could also be adapted to treat other autoimmune skin diseases such as vitiligo, atopic dermatitis, and psoriasis, the researchers say.

“This innovative approach marks a paradigm shift. Rather than suppressing the immune system, we’re now focusing on regulating it precisely at the site of antigen encounter to generate immune tolerance,” says Natalie Artzi, a principal research scientist in MIT’s Institute for Medical Engineering and Science, an associate professor of medicine at Harvard Medical School and Brigham and Women’s Hospital, and an associate faculty member at the Wyss Institute of Harvard University.

Artzi and Jamil R. Azzi, an associate professor of medicine at Harvard Medical School and Brigham and Women’s Hospital, are the senior authors of the new study , which appears in the journal Advanced Materials . Nour Younis, a Brigham and Women’s postdoc, and Nuria Puigmal, a Brigham and Women’s postdoc and former MIT research affiliate, are the lead authors of the paper.

The researchers are now working on launching a company to further develop the technology, led by Puigmal, who was recently awarded a Harvard Business School Blavatnik Fellowship.

Direct delivery

Alopecia areata, which affects more than 6 million Americans, occurs when the body’s own T cells attack hair follicles, leading the hair to fall out. The only treatment available to most patients — injections of immunosuppressant steroids into the scalp — is painful and patients often can’t tolerate it.

Some patients with alopecia areata and other autoimmune skin diseases can also be treated with immunosuppressant drugs that are given orally, but these drugs lead to widespread suppression of the immune system, which can have adverse side effects.

“This approach silences the entire immune system, offering relief from inflammation symptoms but leading to frequent recurrences. Moreover, it increases susceptibility to infections, cardiovascular diseases, and cancer,” Artzi says.

A few years ago, at a working group meeting in Washington, Artzi happened to be seated next to Azzi (the seating was alphabetical), an immunologist and transplant physican who was seeking new ways to deliver drugs directly to the skin to treat skin-related diseases.

Their conversation led to a new collaboration, and the two labs joined forces to work on a microneedle patch to deliver drugs to the skin. In 2021, they reported that such a patch can be used to prevent rejection following skin transplant. In the new study, they began applying this approach to autoimmune skin disorders.

“The skin is the only organ in our body that we can see and touch, and yet when it comes to drug delivery to the skin, we revert to systemic administration. We saw great potential in utilizing the microneedle patch to reprogram the immune system locally,” Azzi says.

The microneedle patches used in this study are made from hyaluronic acid crosslinked with polyethylene glycol (PEG), both of which are biocompatible and commonly used in medical applications. With this delivery method, drugs can pass through the tough outer layer of the epidermis, which can’t be penetrated by creams applied to the skin.

“This polymer formulation allows us to create highly durable needles capable of effectively penetrating the skin. Additionally, it gives us the flexibility to incorporate any desired drug,” Artzi says. For this study, the researchers loaded the patches with a combination of the cytokines IL-2 and CCL-22. Together, these immune molecules help to recruit regulatory T cells, which proliferate and help to tamp down inflammation. These cells also help the immune system learn to recognize that hair follicles are not foreign antigens, so that it will stop attacking them.

Hair regrowth

The researchers found that mice treated with this patch every other day for three weeks had many more regulatory T cells present at the site, along with a reduction in inflammation. Hair was able to regrow at those sites, and this growth was maintained for several weeks after the treatment ended. In these mice, there were no changes in the levels of regulatory T cells in the spleen or lymph nodes, suggesting that the treatment affected only the site where the patch was applied.

In another set of experiments, the researchers grafted human skin onto mice with a humanized immune system. In these mice, the microneedle treatment also induced proliferation of regulatory T cells and a reduction in inflammation.

The researchers designed the microneedle patches so that after releasing their drug payload, they can also collect samples that could be used to monitor the progress of the treatment. Hyaluronic acid causes the needles to swell about tenfold after entering the skin, which allows them to absorb interstitial fluid containing biomolecules and immune cells from the skin.

Following patch removal, researchers can analyze samples to measure levels of regulatory T cells and inflammation markers. This could prove valuable for monitoring future patients who may undergo this treatment.

The researchers now plan to further develop this approach for treating alopecia, and to expand into other autoimmune skin diseases.

The research was funded by the Ignite Fund and Shark Tank Fund awards from the Department of Medicine at Brigham and Women’s Hospital.

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MIT researchers have developed microneedle patches that are capable of restoring hair growth in alopecia areata patients, reports Ernie Mundell for HealthDay . The team’s approach includes a, “patch containing myriad microneedles that is applied to the scalp,” writes Mundell. “It releases drugs to reset the immune system so it stops attacking follicles.” 

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New NASA Black Hole Visualization Takes Viewers Beyond the Brink

Ever wonder what happens when you fall into a black hole? Now, thanks to a new, immersive visualization produced on a NASA supercomputer, viewers can plunge into the event horizon, a black hole’s point of no return.

“People often ask about this, and simulating these difficult-to-imagine processes helps me connect the mathematics of relativity to actual consequences in the real universe,” said Jeremy Schnittman, an astrophysicist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, who created the visualizations. “So I simulated two different scenarios, one where a camera — a stand-in for a daring astronaut — just misses the event horizon and slingshots back out, and one where it crosses the boundary, sealing its fate.”

The visualizations are available in multiple forms. Explainer videos act as sightseeing guides, illuminating the bizarre effects of Einstein’s general theory of relativity. Versions rendered as 360-degree videos let viewers look all around during the trip, while others play as flat all-sky maps.

To create the visualizations, Schnittman teamed up with fellow Goddard scientist Brian Powell and used the Discover supercomputer at the NASA Center for Climate Simulation . The project generated about 10 terabytes of data — equivalent to roughly half of the estimated text content in the Library of Congress — and took about 5 days running on just 0.3% of Discover’s 129,000 processors. The same feat would take more than a decade on a typical laptop.

The destination is a supermassive black hole with 4.3 million times the mass of our Sun, equivalent to the monster located at the center of our Milky Way galaxy.

“If you have the choice, you want to fall into a supermassive black hole,” Schnittman explained. “Stellar-mass black holes, which contain up to about 30 solar masses,  possess much smaller event horizons and stronger tidal forces, which can rip apart approaching objects before they get to the horizon.”

This occurs because the gravitational pull on the end of an object nearer the black hole is much stronger than that on the other end. Infalling objects stretch out like noodles, a process astrophysicists call spaghettification .

The simulated black hole’s event horizon spans about 16 million miles (25 million kilometers), or about 17% of the distance from Earth to the Sun. A flat, swirling cloud of hot, glowing gas called an accretion disk surrounds it and serves as a visual reference during the fall. So do glowing structures called photon rings, which form closer to the black hole from light that has orbited it one or more times. A backdrop of the starry sky as seen from Earth completes the scene.

As the camera approaches the black hole, reaching speeds ever closer to that of light itself, the glow from the accretion disk and background stars becomes amplified in much the same way as the sound of an oncoming racecar rises in pitch. Their light appears brighter and whiter when looking into the direction of travel.

The movies begin with the camera located nearly 400 million miles (640 million kilometers) away, with the black hole quickly filling the view. Along the way, the black hole’s disk, photon rings, and the night sky become increasingly distorted — and even form multiple images as their light traverses the increasingly warped space-time.

In real time, the camera takes about 3 hours to fall to the event horizon, executing almost two complete 30-minute orbits along the way. But to anyone observing from afar, it would never quite get there. As space-time becomes ever more distorted closer to the horizon, the image of the camera would slow and then seem to freeze just shy of it. This is why astronomers originally referred to black holes as “frozen stars.”

At the event horizon, even space-time itself flows inward at the speed of light, the cosmic speed limit. Once inside it, both the camera and the space-time in which it's moving rush toward the black hole's center — a one-dimensional point called a singularity , where the laws of physics as we know them cease to operate.

“Once the camera crosses the horizon, its destruction by spaghettification is just 12.8 seconds away,” Schnittman said. From there, it’s only 79,500 miles (128,000 kilometers) to the singularity. This final leg of the voyage is over in the blink of an eye.

In the alternative scenario, the camera orbits close to the event horizon but it never crosses over and escapes to safety. If an astronaut flew a spacecraft on this 6-hour round trip while her colleagues on a mothership remained far from the black hole, she’d return 36 minutes younger than her colleagues. That’s because time passes more slowly near a strong gravitational source and when moving near the speed of light.

“This situation can be even more extreme,” Schnittman noted. “If the black hole were rapidly rotating, like the one shown in the 2014 movie ‘Interstellar,’ she would return many years younger than her shipmates.”

By Francis Reddy NASA’s Goddard Space Flight Center , Greenbelt, Md. Media Contact: Claire Andreoli 301-286-1940 [email protected] NASA’s Goddard Space Flight Center, Greenbelt, Md.

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Oxford University Press's Academic Insights for the Thinking World

Are academic researchers embracing or resisting generative AI? And how should publishers respond?

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Learn more about the world of academic publishing—from open access to peer review, accessibility to getting published—with our Publishing 101 series on the OUPblog.

• By David Clark
• May 13 th 2024

The most interesting thing about any technology is how it affects humans: how it makes us more or less collaborative, how it accelerates discovery and communication, or how it distracts and frustrates us. We saw this in the 1990s. As the internet became more ubiquitous, researchers began experimenting with collaborative writing tools that allowed multiple authors to work on a single document simultaneously, regardless of their physical locations. Some of the earliest examples were the Collaboratories launched by researchers in the mid-1990s at the University of Michigan. These platforms enabled real-time co-authoring, annotation, and discussion, streamlining the research process and fostering international collaborations that would have been unimaginable just a few years earlier.

Most people, but not all, would agree that the internet has benefitted research and researchers’ working lives. But can we be so sure about the role of new technologies today, and, most immediately, generative AI?

Anyone with a stake in research—researchers, societies, and publishers, to name a few—should be considering an AI-enabled future and their role in it. As the largest not-for-profit research publisher, OUP is beginning to define the principles on which we are engaging with companies creating Large Language Models (LLMs). I wrote about this more extensively in the Times Higher Education , but important considerations for us include: a respect for intellectual property, understanding the importance of technology to support pedagogy and research, appropriate compensation and routes to attribution for authors, and robust escalation routes with developers to address errors or problems.

Ultimately, we want to understand what researchers consider important in the decision to engage with generative AI—what excites or concerns them, how they are using or imagining using AI tools, and the role they believe publishers (among other institutional stakeholders) can play in supporting and protecting their published research.

We recently carried out a global survey of researchers to explore how they felt about all aspects of AI—we heard from thousands of researchers across geographies, disciplines, and career stages. The results are revealing in many important ways, and we will be sharing these findings in more detail soon, but the point that struck me immediately was that many researchers are looking for guidance from their institutions, their scholarly societies, and publishers on how to make best use of AI.

Publishers like OUP are uniquely positioned to advocate for the protection of researchers and their research within LLMs. And we are beginning to do so in important ways, because Gen AI and LLM providers want unbiased, high-quality scholarly data to train their models, and the most responsible providers appreciate that seeking permission (and paying for that) is the most sustainable way of building models that will beat the competition. LLMs are not being built with the intention of replacing researchers, and nor should they be. However, such tools should benefit from using high quality scholarly literature, in addition to much of what sits on the public web. And since the Press, and other publishers, will use Gen AI technologies to make its own products and services better and more usable, we want LLMs to be as neutral and unbiased as possible.

As we enter discussions with LLM providers, we have important considerations to guide us. For example, we’d need assurances that there will be no intended verbatim reproduction rights or citation in connection with display (this includes not surfacing the content itself); that the content would not be used for the creation of substantially similar content, including reverse engineering; and that no services or products would be created for the sole purpose of creating original scholarship. The central theme guiding all of these discussions and potential agreements is to protect research authors against plagiarism in any of its forms.

We know this is a difficult challenge, particularly given how much research content has already been ingested into LLMs by users engaging with these conversational AI tools. But publishers like OUP are well positioned to take this on, and I believe we can make a difference as these tools evolve. And by taking this approach, we hope to ensure that researchers can either begin or continue to make use of the best of AI tools to improve their research outcomes.

Featured image by Alicia Perkins for OUP.

David Clark , Managing Director, Academic Division, Oxford University Press

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Collection  12 March 2023

Journal Top 100 - 2022

This collection highlights our most downloaded* research papers published in 2022. Featuring authors from around the world, these papers highlight valuable research from an international community.

You can also check out the Top 100 across various subject areas here .

*Data obtained from SN Insights, which is based on Digital Science’s Dimensions.

mRNA vaccine-induced antibodies more effective than natural immunity in neutralizing SARS-CoV-2 and its high affinity variants

• Dominic Esposito

Cats learn the names of their friend cats in their daily lives

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Metformin administration is associated with enhanced response to transarterial chemoembolization for hepatocellular carcinoma in type 2 diabetes patients

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• Jin-Wook Kim

The impact of digital media on children’s intelligence while controlling for genetic differences in cognition and socioeconomic background

• Bruno Sauce
• Magnus Liebherr
• Torkel Klingberg

Life tables of annual life expectancy and mortality for companion dogs in the United Kingdom

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• Dave C. Brodbelt
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Bioarchaeological and palaeogenomic portrait of two Pompeians that died during the eruption of Vesuvius in 79 AD

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• Serena Viva
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Reading on a smartphone affects sigh generation, brain activity, and comprehension

• Motoyasu Honma
• Yuri Masaoka
• Masahiko Izumizaki

Principal Component Analyses (PCA)-based findings in population genetic studies are highly biased and must be reevaluated

• Eran Elhaik

The determinants of COVID-19 morbidity and mortality across countries

• Dianna Chang
• Kelvin Jui Keng Tan

Birdsongs alleviate anxiety and paranoia in healthy participants

• J. Sundermann

Identification of ADS024, a newly characterized strain of Bacillus velezensis with direct Clostridiodes difficile killing and toxin degradation bio-activities

• Michelle M. O’Donnell
• James W. Hegarty
• Laurent Chesnel

Multiple sclerosis genetic and non-genetic factors interact through the transient transcriptome

• Renato Umeton
• Gianmarco Bellucci
• Giovanni Ristori

The effect of metformin on the survival of colorectal cancer patients with type 2 diabetes mellitus

• Zeinab Tarhini
• Kamelia Manceur
• Niki Christou

Chemical characterisation of the vapour emitted by an e-cigarette using a ceramic wick-based technology

• M. Isabel Pinto

Large-magnitude (VEI ≥ 7) ‘wet’ explosive silicic eruption preserved a Lower Miocene habitat at the Ipolytarnóc Fossil Site, North Hungary

• Dávid Karátson
• Imre Szarvas

Far-UVC (222 nm) efficiently inactivates an airborne pathogen in a room-sized chamber

• Waseem Hiwar
• Kenneth Wood

Low dose aspirin associated with greater bone mineral density in older adults

• Hongzhan Liu
• Xungang Xiao

First direct evidence of adult European eels migrating to their breeding place in the Sargasso Sea

• Rosalind M. Wright
• Adam T. Piper
• David Righton

Infections with the SARS-CoV-2 Delta variant exhibit fourfold increased viral loads in the upper airways compared to Alpha or non-variants of concern

• Christian J. H. von Wintersdorff
• Jozef Dingemans
• Paul H. M. Savelkoul

Inappropriate sinus tachycardia in post-COVID-19 syndrome

• Júlia Aranyó
• Victor Bazan
• Roger Villuendas

The microstructure and the origin of the Venus from Willendorf

• Gerhard W. Weber
• Alexander Lukeneder

COVID-19 reinfections among naturally infected and vaccinated individuals

• Sezanur Rahman
• M. Mahfuzur Rahman
• Mustafizur Rahman

Lockdown measures during the COVID-19 pandemic strongly impacted the circulation of respiratory pathogens in Southern China

• Heping Wang
• Yuejie Zheng
• Wenjian Wang

Alzheimer’s disease large-scale gene expression portrait identifies exercise as the top theoretical treatment

• Mason A. Hill
• Stephen C. Gammie

COVID-19 symptoms are reduced by targeted hydration of the nose, larynx and trachea

• Carolin Elizabeth George
• Gerhard Scheuch
• David A. Edwards

SARS-CoV-2 spike protein induces cognitive deficit and anxiety-like behavior in mouse via non-cell autonomous hippocampal neuronal death

• Junyoung Oh
• Woo-Hyun Cho
• Sung Joong Lee

Abdominal pain patterns during COVID-19: an observational study

• Alexandre Balaphas
• Kyriaki Gkoufa
• Christian Toso

Detection of human pathogenic bacteria in rectal DNA samples from Zalophus californianus in the Gulf of California, Mexico

• Francesco Cicala
• David Ramírez-Delgado
• Alexei F. Licea-Navarro

Industrialised fishing nations largely contribute to floating plastic pollution in the North Pacific subtropical gyre

• Laurent Lebreton
• Sarah-Jeanne Royer
• Matthias Egger

Hypertension and diabetes including their earlier stage are associated with increased risk of sudden cardiac arrest

• Seung Young Roh
• Young-Hoon Kim

Utility of an artificial intelligence system for classification of esophageal lesions when simulating its clinical use

• Ayaka Tajiri
• Ryu Ishihara
• Tomohiro Tada

Prevalence, age of decision, and interpersonal warmth judgements of childfree adults

• Zachary P. Neal
• Jennifer Watling Neal

Acute and protracted abstinence from methamphetamine bidirectionally changes intrinsic excitability of indirect pathway spiny projection neurons in the dorsomedial striatum

• Sanghoon Choi
• Steven M. Graves

Indeterminacy of cannabis impairment and ∆ 9 -tetrahydrocannabinol (∆ 9 -THC) levels in blood and breath

• Gregory T. Wurz
• Michael W. DeGregorio

High rates of plasmid cotransformation in E. coli overturn the clonality myth and reveal colony development

• Delia Tomoiaga
• Jaclyn Bubnell
• Paul Feinstein

Metformin sensitizes leukemic cells to cytotoxic lymphocytes by increasing expression of intercellular adhesion molecule-1 (ICAM-1)

• Nerea Allende-Vega
• Joaquin Marco Brualla
• Martin Villalba

Incorporation of machine learning and deep neural network approaches into a remote sensing-integrated crop model for the simulation of rice growth

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• Jong-min Yeom

Perceiving societal pressure to be happy is linked to poor well-being, especially in happy nations

• Egon Dejonckheere
• Joshua J. Rhee
• Brock Bastian

The earliest Pleistocene record of a large-bodied hominin from the Levant supports two out-of-Africa dispersal events

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• Miriam Belmaker

Generation mechanism and prediction of an observed extreme rogue wave

• Johannes Gemmrich

Fitness tracking reveals task-specific associations between memory, mental health, and physical activity

• Jeremy R. Manning
• Gina M. Notaro
• Paxton C. Fitzpatrick

Domestic dogs ( Canis familiaris ) grieve over the loss of a conspecific

• Stefania Uccheddu
• Lucia Ronconi
• Federica Pirrone

Human transgenerational observations of regular smoking before puberty on fat mass in grandchildren and great-grandchildren

• Jean Golding
• Steve Gregory
• Matthew Suderman

Chlamydia pneumoniae can infect the central nervous system via the olfactory and trigeminal nerves and contributes to Alzheimer’s disease risk

• Jenny A. K. Ekberg

Oxycodone/naloxone versus tapentadol in real-world chronic non-cancer pain management: an observational and pharmacogenetic study

• Jordi Barrachina
• Cesar Margarit
• Ana M. Peiró

Cooking methods are associated with inflammatory factors, renal function, and other hormones and nutritional biomarkers in older adults

• Montserrat Rodríguez-Ayala
• José Ramón Banegas
• Pilar Guallar-Castillón

Classification of pig calls produced from birth to slaughter according to their emotional valence and context of production

• Elodie F. Briefer
• Ciara C.-R. Sypherd
• Céline Tallet

Higher emotional awareness is associated with greater domain-general reflective tendencies

• Michelle Persich
• William D. S. Killgore

A large Megaraptoridae (Theropoda: Coelurosauria) from Upper Cretaceous (Maastrichtian) of Patagonia, Argentina

• Alexis M. Aranciaga Rolando
• Matias J. Motta
• Fernando E. Novas

Long COVID occurrence in COVID-19 survivors

• Aya Sugiyama
• Junko Tanaka

Water activated disposable paper battery

• Alexandre Poulin
• Xavier Aeby
• Gustav Nyström

Intestinal preservation in a birdlike dinosaur supports conservatism in digestive canal evolution among theropods

• Yichuan Liu

Antiviral effect of cetylpyridinium chloride in mouthwash on SARS-CoV-2

• Hirofumi Sawa

Evidence of an oceanic impact and megatsunami sedimentation in Chryse Planitia, Mars

• J. Alexis P. Rodriguez
• Darrel K. Robertson
• Mario Zarroca

Curcumin and metformin synergistically modulate peripheral and central immune mechanisms of pain

• Peththa Wadu Dasuni Wasana
• Pasarapa Towiwat

The first occurrence of an avian-style respiratory infection in a non-avian dinosaur

• D. Cary Woodruff
• Ewan D. S. Wolff
• Lawrence M. Witmer

Optimal linear estimation models predict 1400–2900 years of overlap between Homo sapiens and Neandertals prior to their disappearance from France and northern Spain

• Igor Djakovic
• Alastair Key
• Marie Soressi

The influence of time on the sensitivity of SARS-CoV-2 serological testing

• Arturo Torres Ortiz
• Fernanda Fenn Torrente
• Louis Grandjean

Online misinformation is linked to early COVID-19 vaccination hesitancy and refusal

• Francesco Pierri
• Brea L. Perry
• John Bryden

A distinct symptom pattern emerges for COVID-19 long-haul: a nationwide study

• Melissa D. Pinto
• Charles A. Downs
• Natalie Lambert

SARS-CoV-2-reactive IFN-γ-producing CD4 + and CD8 + T cells in blood do not correlate with clinical severity in unvaccinated critically ill COVID-19 patients

• Beatriz Olea
• Eliseo Albert
• David Navarro

Classification of 74 facial emoji’s emotional states on the valence-arousal axes

• Gaku Kutsuzawa
• Hiroyuki Umemura
• Yoshiyuki Kobayashi

The emergence of a new sex-system (XX/XY 1 Y 2 ) suggests a species complex in the “monotypic” rodent Oecomys auyantepui (Rodentia, Sigmodontinae)

• Willam Oliveira da Silva
• Celina Coelho Rosa
• Cleusa Yoshiko Nagamachi

Detection of COVID-19 using multimodal data from a wearable device: results from the first TemPredict Study

• Ashley E. Mason
• Frederick M. Hecht
• Benjamin L. Smarr

Spinal degeneration is associated with lumbar multifidus morphology in secondary care patients with low back or leg pain

• Jeffrey R. Cooley
• Tue S. Jensen
• Jeffrey J. Hebert

Phenomenology and content of the inhaled N , N -dimethyltryptamine ( N , N -DMT) experience

• David Wyndham Lawrence
• Robin Carhart-Harris
• Christopher Timmermann

A gigantic bizarre marine turtle (Testudines: Chelonioidea) from the Middle Campanian (Late Cretaceous) of South-western Europe

• Oscar Castillo-Visa
• Àngel H. Luján
• Albert Sellés

The first experience with fully endoscopic posterior cervical foraminotomy and discectomy for radiculopathy performed in Viet Duc University Hospital

• Son Ngoc Dinh
• Hung The Dinh

Mapping the “catscape” formed by a population of pet cats with outdoor access

• Richard Bischof
• Nina Rosita Hansen
• Torbjørn Haugaasen

Investigation of humans individual differences as predictors of their animal interaction styles, focused on the domestic cat

• Lauren R. Finka
• Lucia Ripari
• Marnie L. Brennan

Genesis of fecal floatation is causally linked to gut microbial colonization in mice

• Syed Mohammed Musheer Aalam
• Daphne Norma Crasta
• Nagarajan Kannan

Young children’s screen time during the first COVID-19 lockdown in 12 countries

• Christina Bergmann
• Nevena Dimitrova
• Nivedita Mani

Cichlids and stingrays can add and subtract ‘one’ in the number space from one to five

• V. Schluessel

Elevated estradiol levels in frozen embryo transfer have different effects on pregnancy outcomes depending on the stage of transferred embryos

• Liming Ruan

Group VR experiences can produce ego attenuation and connectedness comparable to psychedelics

• David R. Glowacki
• Rhoslyn Roebuck Williams
• Mike Chatziapostolou

New therizinosaurid dinosaur from the marine Osoushinai Formation (Upper Cretaceous, Japan) provides insight for function and evolution of therizinosaur claws

• Yoshitsugu Kobayashi
• Ryuji Takasaki
• Yoshinori Hikida

Smartphone-based ecological momentary assessment reveals mental health benefits of birdlife

• Ryan Hammoud
• Stefania Tognin
• Andrea Mechelli

Long-term outcomes of cataract surgery with toric intraocular lens implantation by the type of preoperative astigmatism

• Tetsuro Oshika
• Shinichiro Nakano
• Tsutomu Kaneko

Forest fire detection system using wireless sensor networks and machine learning

• Udaya Dampage
• Lumini Bandaranayake
• Bathiya Jayasanka

Misinformation of COVID-19 vaccines and vaccine hesitancy

• Sun Kyong Lee
• Juhyung Sun
• Shane Connelly

Deep language algorithms predict semantic comprehension from brain activity

• Charlotte Caucheteux
• Alexandre Gramfort
• Jean-Rémi King

Children with autism spectrum disorder show atypical electroencephalographic response to processing contextual incongruencies

• Amparo V. Márquez-García
• Vasily A. Vakorin
• Sam M. Doesburg

A generalizable one health framework for the control of zoonotic diseases

• Ria R. Ghai
• Ryan M. Wallace
• Casey Barton Behravesh

HS3ST2 expression induces the cell autonomous aggregation of tau

• M. B. Huynh
• N. Rebergue
• D. Papy-Garcia

Exceptional warming over the Barents area

• Ketil Isaksen
• Øyvind Nordli
• Tatiana Karandasheva

A new Early Cretaceous lizard in Myanmar amber with exceptionally preserved integument

• Andrej Čerňanský
• Edward L. Stanley
• Susan E. Evans

Coffee consumption and diabetic retinopathy in adults with diabetes mellitus

• Hak Jun Lee
• Daniel Duck-Jin Hwang

Shifts in the foraging tactics of crocodiles following invasion by toxic prey

• Abhilasha Aiyer
• Richard Shine
• Georgia Ward-Fear

Production of high loading insulin nanoparticles suitable for oral delivery by spray drying and freeze drying techniques

• Alberto Baldelli
• Anubhav Pratap-Singh

Cable news and COVID-19 vaccine uptake

• Matteo Pinna
• Christoph Goessmann

Estimating the time of last drinking from blood ethyl glucuronide and ethyl sulphate concentrations

• Zhongyuan Guo

COVID-19 infections in infants

• Małgorzata Sobolewska-Pilarczyk
• Maria Pokorska-Śpiewak
• Małgorzata Pawłowska

COVID-19 increases the risk for the onset of atrial fibrillation in hospitalized patients

• Jakob Wollborn
• Sergey Karamnov
• Jochen D. Muehlschlegel

Childhood temperament and adulthood personality differentially predict life outcomes

• Amanda J. Wright
• Joshua J. Jackson

Antivirus applied to JAR malware detection based on runtime behaviors

• Ricardo P. Pinheiro
• Sidney M. L. Lima
• Wellington P. dos Santos

Therapeutic enzyme engineering using a generative neural network

• Andrew Giessel
• Athanasios Dousis
• Stuart Licht

Identification of genes associated with human-canine communication in canine evolution

• Akiko Tonoike
• Ken-ichi Otaki
• Miho Nagasawa

Breath chemical markers of sexual arousal in humans

• G. Pugliese
• J. Williams

A 5-km-thick reservoir with > 380,000 km 3 of magma within the ancient Earth's crust

• Rais Latypov
• Sofya Chistyakova
• Mauritz van der Merwe

Return of large fin whale feeding aggregations to historical whaling grounds in the Southern Ocean

• Helena Herr
• Sacha Viquerat
• Bettina Meyer

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