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Search over 200 individual encyclopedias and reference books from the worlds most trusted publishers. Find facts, videos, and pictures on various topics, from science and history to business and culture.
- Earth and Environment
Want to learn about earth and the environment? You’ll find...
- History
Few other categories or areas of study offer as rich or as...
- Literature and the Arts
If people can create it, you’ll probably find it in this...
- Medicine
The history of medicine can be traced back as far as...
- People
The accomplishments of people are documented throughout this...
- Philosophy and Religion
Throughout history, philosophy and religion have played a...
- Places
Where in the world is this category? Everywhere. There are...
- Plants and Animals
The surface of the earth is covered with plants and animals,...
- Earth and Environment
Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.
Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
The largest online encyclopedias are general reference works, though there are also many specialized ones. Some online encyclopedias are editions of a print encyclopedia, such as Encyclopædia Britannica, whereas others have always existed online, such as Wikipedia .
World History Encyclopedia is a non-profit organization that provides free history education to the world. Explore fact-checked articles, images, videos, maps and timelines on various topics and periods of history.
Wikipedia [c] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.
The English Wikipedia is the primary English-language edition of Wikipedia, an online encyclopedia. It was created by Jimmy Wales and Larry Sanger on 15 January 2001, as Wikipedia's first edition. English Wikipedia is hosted alongside other language editions by the Wikimedia Foundation , an American nonprofit organization .
