According to official documents, Luo Meizhen was born in 1885, which would make her 127 years old when she died in 2013 and the oldest person ever to have lived.
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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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The oldest recorded elephant lived for 82 years.
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Men who kiss their wives in the morning live five years longer than those who don't.
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