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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Nylon is made from coal and petroleum.
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
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Iron weighs more after it rusts.
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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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Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
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A ball of glass will bounce higher than a ball made of rubber.
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