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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The smell of freshly cut grass is actually a plant distress call.
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The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
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Pure water (H2O) does not conduct electricity on its own.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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