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 is a disease called ichthyosis that turns the skin scaly like a fish.
90
Your body is creating and killing about 2.4 million red blood cells per second.
17
Fingernails grow nearly 4 times faster than toenails!
30
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Enamel is hardest substance in the human body.
61
There are about 1,400 different species of bacteria in your belly button.
10
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
202