Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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The human sigh acts as a physiological reset button.
23
The average sperm cell swims at 8 inches per hour.
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The human brain uses approximately as much energy as a 10 watt light bulb.
120
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Within three days of death, the enzymes that once digested your food begin to eat you.
22
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.
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