The human brain is insensitive to pain.
76
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
In one day, adult lungs move about 10,000 litres of air.
11
Smokers get ten times more wrinkles than non-smokers.
171
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.
21
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9