Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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A person can live without food for about a month, but only about a week without water.
156
If your DNA was stretched out it would reach to the moon 6,000 times.
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In one day, adult lungs move about 10,000 litres of air.
11
The human body contains over a billion miles of DNA.
147
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
30
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
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