Yawns are more contagious among people with closer relationships.
163
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
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
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
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