Enamel is hardest substance in the human body.
61
Chewing gum boosts your brain power.
285
Poor eyesight (myopia) is associated with higher IQ.
232
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
If your DNA was stretched out it would reach to the moon 6,000 times.
256
Every year your body replaces 98% of your atoms.
119
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The human brain doesn't stop developing until about 25 years old.
102