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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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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The inventor of the Super Soaker squirt gun was a NASA Scientist who also helped develop the Stealth Bomber and the Galileo mission to Jupiter.
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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The bark of an older redwood tree is fireproof.
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In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
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In zero gravity, a candle's flame is round and blue.
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For every gallon of sea water, you get more than a quarter pound of salt.
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