The average sperm cell swims at 8 inches per hour.
76
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Yawns are more contagious among people with closer relationships.
163
When you take a step, you are using up to 200 muscles.
885
One human hair can support 3 ounces.
191
Chewing gum boosts your brain power.
285
The human body contains over a billion miles of DNA.
147