The average sperm cell swims at 8 inches per hour.
76
Poor eyesight (myopia) is associated with higher IQ.
232
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13