A man's beard grows fastest when he anticipates sex.
239
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Every human spent about half an hour as a single cell.
144
The human sigh acts as a physiological reset button.
23
It takes about 20 seconds for a red blood cell to circle the whole body.
102
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Pain occurs when sounds are above 130 db.
124
Only humans shed emotional tears.
331