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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Scientists in Germany have developed a candy that doesn't cause cavities.
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For every gallon of sea water, you get more than a quarter pound of salt.
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One cubic foot of gold weighs more than 1,200 pounds!
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A cubic yard of air weighs about 2 pounds at sea level.
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Sound travels fifteen times faster through steel than through air.
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One gallon of used motor oil can ruin approximately one million gallons of fresh water!
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