Enamel is hardest substance in the human body.
61
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
The average person's skin weighs twice as much as their brain.
131
Poor eyesight (myopia) is associated with higher IQ.
232
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111