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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If the chemical sodium is dropped into water it will immediately and violently explode.
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Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
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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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One barrel of petroleum holds 42 gallons.
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Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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Scientists in Germany have developed a candy that doesn't cause cavities.
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