"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 ...

Discover 25 fascinating "Today I Learned" facts that will blow your mind! From useless elevator buttons to ancient ice houses ...

He was never afraid to get his hands dirty, to get up close and personal with any and every kind of critter and creature near ...

Slugs are commonly seen as slow-moving, slimy creatures that live in gardens, but the biology of slugs is actually quite ...