The average sperm cell swims at 8 inches per hour.
4
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Gorillas can catch human colds and other illnesses.
205
Your fingernails grow faster in summer.
744
If your DNA was stretched out it would reach to the moon 6,000 times.
256