Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
In one day, adult lungs move about 10,000 litres of air.
11
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
There are about 1,400 different species of bacteria in your belly button.
10
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
The human body contains over a billion miles of DNA.
147