It takes about 20 seconds for a red blood cell to circle the whole body.
102
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Early American humans hunted car-size armadillos and used their shells for houses.
12