The human brain is insensitive to pain.
76
Fingernails grow fastest on the hand you favor.
44
Your body is creating and killing 15 million red blood cells per second!
14
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
Sitting straight upright in your chair is bad for your back. You should instead slouch at an angle of 135 degrees.
10
Your heart pumps about 2,000 gallons of blood each day!
53
Wearing headphones for an hour increases the bacteria in your ear 700 times.
233