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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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
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Pumice is the only rock that floats on water.
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Nearly 50% of the world's scientists are assigned to military projects.
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Sound travels fifteen times faster through steel than through air.
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Scientists in Germany have developed a candy that doesn't cause cavities.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
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