Your fingernails grow faster in summer.
744
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Only humans shed emotional tears.
331
A man's beard grows fastest when he anticipates sex.
239
Every human spent about half an hour as a single cell.
144
One human hair can support 3 ounces.
191
The average sperm cell swims at 8 inches per hour.
4