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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Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
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One third of the electricity produced on earth is used to power electric light bulbs!
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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.
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One barrel of petroleum holds 42 gallons.
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
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The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
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