Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human brain is more active during sleep than during the day.
28
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Tigers can see 6 times better at night than humans.
305