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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Indoor pollution is 10 times more toxic than outdoor pollution.
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No matter how cold it gets, gasoline will not freeze.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
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!
21
A ball of glass will bounce higher than a ball made of rubber.
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