Every human spent about half an hour as a single cell.
144
By weight, Bone is five times stronger than steel.
417
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
You can't tickle yourself.
29
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191