The average sperm cell swims at 8 inches per hour.
76
The average person's skin weighs twice as much as their brain.
131
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
If your DNA was stretched out it would reach to the moon 6,000 times.
256
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Your thumb is about the same size as your nose.
124
Enamel is hardest substance in the human body.
61
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18