For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
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
Yawns are more contagious among people with closer relationships.
163
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
A person can live without food for about a month, but only about a week without water.
156
Pain occurs when sounds are above 130 db.
124