All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
In one day, adult lungs move about 10,000 litres of air.
11
A human being loses an average of 40 to 100 strands of hair a day.
133
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
A person can live without food for about a month, but only about a week without water.
156
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515