Pain occurs when sounds are above 130 db.
124
The human body contains over a billion miles of DNA.
147
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
202
Fingernails grow nearly 4 times faster than toenails.
31
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37