Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Your body is creating and killing about 2.4 million red blood cells per second.
17
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
A human being loses an average of 40 to 100 strands of hair a day.
133
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
In one day, adult lungs move about 10,000 litres of air.
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