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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Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
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In zero gravity, a candle's flame is round and blue.
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Pumice is the only rock that floats on water.
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Neanderthal man had a brain capacity 100cc larger than modern man's.
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