Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Held in farts enter your bloodstream and are bad for your body.
26
Your heart will pump about 212 million liters in its lifetime.
26
One human hair can support 3 ounces.
191
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