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
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Poor eyesight (myopia) is associated with higher IQ.
232
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
Chewing gum boosts your brain power.
285
The largest cell in the human body is the female egg and the smallest is the male sperm.
682