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
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
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
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
Within three days of death, the enzymes that once digested your food begin to eat you.
22
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
There's 100 trillion good bacteria living in your body.
17
The human body contains over a billion miles of DNA.
147