A 'jiffy' is an actual unit of time for 1/100th of a second!
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The average temperature at 40,000 feet above sea level is -60 F.
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There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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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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For every gallon of sea water, you get more than a quarter pound of salt.
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