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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Pumice is the only rock that floats on water.
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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One cubic foot of gold weighs more than 1,200 pounds!
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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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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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