Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Billions of neutrinos pass unnoticed through your body every second.
6
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
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The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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