On average a woman has 4 sexual partners in her lifetime.
-143
A person can live without food for about a month, but only about a week without water.
156
It takes approximately 12 hours for food to entirely digest.
93
The average sperm cell swims at 8 inches per hour.
4
Pain occurs when sounds are above 130 db.
124
Early American humans hunted car-size armadillos and used their shells for houses.
12
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99