There are about 1,400 different species of bacteria in your belly button.
10
Redheads require more anesthesia to 'go under' than other hair colors do.
50
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
Sitting straight upright in your chair is bad for your back. You should instead slouch at an angle of 135 degrees.
10
The smallest human penis ever recorded was just 5/8 of an inch long!
77
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266