There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
Poor eyesight (myopia) is associated with higher IQ.
232
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The average person's skin weighs twice as much as their brain.
131
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human brain is more active during sleep than during the day.
28