In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
A man's beard grows fastest when he anticipates sex.
239
On average, there's 100 billion neurons in the human brain.
83
Early American humans hunted car-size armadillos and used their shells for houses.
12
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118