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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The bark of an older redwood tree is fireproof.
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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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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For every gallon of sea water, you get more than a quarter pound of salt.
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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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Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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