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

Impress your kids with fun facts that are both age-appropriate and surprising. Did you know that ketchup was once sold as medicine in the 1800s, or that Earth has more trees than stars in our galaxy?

"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 ...

Each day, Times Insider editors scour the newspaper for the most interesting facts to appear on our pages. This year, tidbits about plastic recycling, whale sharks and crab Rangoon enlightened and ...

There's a whole world of home science projects beyond the vinegar and baking soda volcano. Credit: peopleimages via Getty Images The vinegar and baking soda volcano is a science fair classic, but ...

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.