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.
5
Airports that are at higher altitudes require a longer airstrip due to lower air density.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
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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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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Sound travels about 4 times faster in water than in air.
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