The average sperm cell swims at 8 inches per hour.
76
Your thumb is about the same size as your nose.
124
Every year your body replaces 98% of your atoms.
119
One human hair can support 3 ounces.
191
Poor eyesight (myopia) is associated with higher IQ.
232
Your body is creating and killing about 2.4 million red blood cells per second.
17
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59