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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There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
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A cesium atom in an atomic clock beats over nine billion times a second.
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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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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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Iron weighs more after it rusts.
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Billions of neutrinos pass unnoticed through your body every second.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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