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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Nearly 50% of the world's scientists are assigned to military projects.
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Pumice is the only rock that floats on water.
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A cubic yard of air weighs about 2 pounds at sea level.
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German chemists made a replica of a trophy the size of one molecule.
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Sound travels fifteen times faster through steel than through air.
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At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
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