The first patented condom was meant to be reused!
47
Like fingerprints, everyone's tongue print is different!
71
Every hour one billion cells in the body must be replaced.
17
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
Dating back to the 1600's, thermometers were filled with Brandy instead of mercury.
16
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
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
Fingernails grow nearly 4 times faster than toenails!
30