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 weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
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The bark of an older redwood tree is fireproof.
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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Indoor pollution is 10 times more toxic than outdoor pollution.
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In zero gravity, a candle's flame is round and blue.
16
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
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The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
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