If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Your body is creating and killing about 2.4 million red blood cells per second.
17
The average sperm cell swims at 8 inches per hour.
76
Yawns are more contagious among people with closer relationships.
163
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Poor eyesight (myopia) is associated with higher IQ.
232