The hairs on a polar bear are not white, but clear. They reflect light, so they appear white. See more

Your skin weighs about 3.2 kg. See more

A rat can last longer without water than a camel can. See more

An octopus can change its shape and color to blend in with its surroundings. See more

An Octopus has 3 hearts. See more

The can opener was invented 48 years after cans were introduced. See more

Starfish haven't got brains. See more

Adolf Hitler had only one testicle. See more

You're born with 300 bones, but when you get to be an adult, you only have 206. See more