Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Our eyes are always the same size from birth, but our nose and ears never stop growing.
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It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
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There are about 1,400 different species of bacteria in your belly button.
10
Our Right Lungs takes more air than our left lung.
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A person can live without food for about a month, but only about a week without water.
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