The smallest human penis ever recorded was just 5/8 of an inch long!
77
Fingernails grow nearly 4 times faster than toenails!
30
Within three days of death, the enzymes that once digested your food begin to eat you.
22
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Smoking while pregnant increases the chances of spontaneous abortions (miscarriages) stillbirths and premature labor.
77
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
Human hair and fingernails continue to grow after death.
7
A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there, though!
25