Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
The human body contains over a billion miles of DNA.
147
Your thumb is about the same size as your nose.
124
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
By weight, Bone is five times stronger than steel.
417
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Every human spent about half an hour as a single cell.
144