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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Iron weighs more after it rusts.
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If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
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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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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Cold water weighs more than hot water.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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