Astronauts grow taller in space. See more

If you leave a goldfish in a dark room for years, it will turn white. See more

Goldfish have the memory span of about 3-5 seconds. See more

Chewing gum while peeling onions will keep you from crying. See more

A giraffe can clean its ears with its 21-inch tongue. See more

Adolf Hitler was a vegetarian. See more

Adolf Hitler had only one testicle. See more

On average, Americans spend about 6 months of their lives waiting in front of traffic lights. See more

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

One quarter of the bones in your body, are in your feet. See more

Human thigh bones are stronger than concrete. See more

It takes about 20 seconds for a red blood cell to circle the whole body. See more

Butterflies taste with their feet. See more

Bees can see ultraviolet light. See more

There are more bacteria in your mouth than the human population of the U.S.A. and Canada combined. See more

After billions of years, black holes become white holes and they spit out all the things they sucked up. See more