Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
Gorillas can catch human colds and other illnesses.
205
The human brain doesn't stop developing until about 25 years old.
102
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
By weight, Bone is five times stronger than steel.
417
You forget 90% of your dreams.
256