The average person's skin weighs twice as much as their brain.
131
Every year your body replaces 98% of your atoms.
119
Enamel is hardest substance in the human body.
61
Chewing gum boosts your brain power.
285
One human hair can support 3 ounces.
191
It takes about 20 seconds for a red blood cell to circle the whole body.
102
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62