"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 ...

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 ...

There's more to a flamingo than its bright pink feathers. Get to know these delightfully unusual birds with 10 fun facts — some of which may surprise you! 1. Flamingo nests are made of mud. A flamingo ...