An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
You can't tickle yourself.
29
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Gorillas can catch human colds and other illnesses.
205
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
Pain occurs when sounds are above 130 db.
124
If the human eye was a digital camera, it would have 576 megapixels.
25
Yawns are more contagious among people with closer relationships.
163