The average sperm cell swims at 8 inches per hour.
4
One quarter of the bones in your body are in your feet!
36
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
Human teeth are almost as hard as rocks!
47
Unlike dogs, pigs, and some other mammals, humans cannot taste water. They taste only the chemicals and impurities in the water.
95
Dieters who sleep more take off more fat that those who sleep less.
159
On average, there's 100 billion neurons in the human brain.
83