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
Pain travels through your body at 350 ft. per second.
36
In the average lifetime a person will breath in about 44 pounds of dust.
21
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
Chewing gum boosts your brain power.
285
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
Human hair and fingernails continue to grow after death.
7