Due to gravitational effects, you weigh slightly less when the moon is directly overhead. See more

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

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

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

Astronauts grow taller in space. See more

An adult human heart weighs about 10 ounces and beats over 100,000 times a day See more

Snakes have one lung. See more

There are more coffee drug addicts in the US than drug addicts of any other kind. See more

There are 206 bones in your skeleton. See more