19. The largest known prime number contains 41,024,320 digits. 20. Frogs breathe and drink through their skin. 21. A bullet ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Stay sharp and learn something new every day or stock up on knowledge for the next 105 days with these ...

The Call Me Kat star talks to PEOPLE about how she's making science more accessible to kids and gives advice about homeschooling Mayim Bialik is famously not only a star of The Big Bang Theory and a ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Stay sharp and learn something new every day or stock up on knowledge for the next 105 days with these fun facts about life, history, food, and more. Although “fun” is in the name, don’t be fooled.