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
Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
The average human body contains enough iron to make a small nail.
50
2 out of 3 adults in the United States have hemorrhoids.
7
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
Men are twice as likely to be binge drinkers than women.
87