Search Britannica
Click here to search
Search Britannica
Click here to search
Subscribe
Login
Subscribe
Now
Home
ProCon
History & Society
Science & Tech
Biographies
Animals & Nature
Geography & Travel
Arts & Culture
Money
Games & Quizzes
Videos
On This Day
One Good Fact
Dictionary
New Articles
History & Society
Lifestyles & Social Issues
Philosophy & Religion
Politics, Law & Government
World History
Science & Tech
Health & Medicine
Science
Technology
Biographies
Browse Biographies
Animals & Nature
Birds, Reptiles & Other Vertebrates
Bugs, Mollusks & Other Invertebrates
Environment
Fossils & Geologic Time
Mammals
Plants
Geography & Travel
Geography & Travel
Arts & Culture
Entertainment & Pop Culture
Literature
Sports & Recreation
Visual Arts
Companions
Demystified
Image Galleries
Lists
Podcasts
Spotlight
Summaries
The Forum
Top Questions
#WTFact
Britannica Kids
Ask the Chatbot
Games & Quizzes
ProCon
History & Society
Science & Tech
Biographies
Animals & Nature
Geography & Travel
Arts & Culture
Money
Videos
#WTFact
Entertainment & Pop Culture
Geography & Travel
Health & Medicine
Lifestyles & Social Issues
Literature
Philosophy & Religion
Politics, Law & Government
Science
Sports & Recreation
Technology
Visual Arts
World History
Investigating Therapeutic Uses for Hallucinogens
After a pause of several decades, scientists have resumed investigating...
The Strange, Grisly History of the First Blood Transfusion
Jean-Baptiste Denis performed the first direct blood transfusion...
9 Bizarre Myths About Pregnancy
That’s one for each month!
9 Fun Facts About Sleep
While you sleep, your body goes to work, restoring itself and...