Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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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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Most dust particles in your house come from dead skin.
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Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
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A single speck of dust is half way in size between a subatomic particle and the Earth.
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Indoor pollution is 10 times more toxic than outdoor pollution.
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