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
You see your nose at all times, your brain just chooses to ignore it.
30
While 7 men in 100 have some form of color blindness, only 1 woman in 1,000 suffers from it.
50
If you unfolded your brain, it would cover an ironing board.
42
Our brains have a negativity bias and will remember bad memories more than good ones.
15
Household bleach is the recommended chemical to decontaminate people exposed to the anthrax virus, by the U.S. F.D.A.
16
A man's beard grows fastest when he anticipates sex.
239