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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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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One cubic foot of gold weighs more than 1,200 pounds!
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Aluminum used to be more valuable than gold!
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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No matter how cold it gets, gasoline will not freeze.
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