4.5 pounds of sunlight strike the Earth each day.
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The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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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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In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
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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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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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