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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Hot water can freeze faster than cold water.
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A cesium atom in an atomic clock beats over nine billion times a second.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
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The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
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