Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
It takes about 20 seconds for a red blood cell to circle the whole body.
102
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
A human being loses an average of 40 to 100 strands of hair a day.
133
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Your fingernails grow faster in summer.
744
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22