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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Nylon is made from coal and petroleum.
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Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
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Iron weighs more after it rusts.
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Scientists aren't sure what color dinosaurs were.
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Cold water weighs more than hot water.
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One cubic foot of gold weighs more than 1,200 pounds!
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