There are about 1,400 different species of bacteria in your belly button.
10
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
108
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112