A person can live without food for about a month, but only about a week without water.
156
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
On average a woman has 4 sexual partners in her lifetime.
-143
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
On average, there's 100 billion neurons in the human brain.
83
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515