Balsa wood is classified as a hard wood!
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One ragweed plant can release as many as one billion grains of pollen!
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One gallon of used motor oil can ruin approximately one million gallons of fresh water!
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Cold water weighs more than hot water.
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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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A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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