Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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A cesium atom in an atomic clock beats over nine billion times a second.
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Pumice is the only rock that floats on water.
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Most dust particles in your house come from dead skin.
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Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
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Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
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