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 1996, research found that having excessive body hair is linked to higher intelligence.
23
A person can live without food for about a month, but only about a week without water.
156
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Your heart will pump about 212 million liters in its lifetime.
26
The human body contains over a billion miles of DNA.
147
One human hair can support 3 ounces.
191