Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Your fingernails grow faster in summer.
744
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
The human sigh acts as a physiological reset button.
23
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Obsessive nose picking is called Rhinotillexomania.
101