Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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The earth is approx. 6,588,000,000,000,000,000 tons.
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Cold water weighs more than hot water.
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One barrel of petroleum holds 42 gallons.
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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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The force of a suction cup is calculated using F=AP.
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German chemists made a replica of a trophy the size of one molecule.
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