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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Passengers on the Beijing subway can pay with plastic bottles.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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China's capital Beijing means "Gate".
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In Chinese, the KFC slogan "finger lickin' good" comes out as "eat your fingers off".
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The world's longest traffic jam took place in Beijing, China. It was over 60 miles long and lasted 11 days.
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