19. The largest known prime number contains 41,024,320 digits. 20. Frogs breathe and drink through their skin. 21. A bullet fired from a 223 Remington leaves the weapon at up to 2,727 mph (4,390 km/h) ...

Talk about a bizarre feature of the human body: If you happened to swallow a razor blade, your stomach acid would dissolve it. Acids are ranked on a scale from zero to 14—the lower the pH level, the ...

"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 ...

Did you know that YouTube adds over 64 new ‘Did You Know?’-type videos to its archives every minute? Ok, so that number may be completely made up, but the whole trend of cramming as many fun science ...