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 weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
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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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In zero gravity, a candle's flame is round and blue.
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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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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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