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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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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Pure water (H2O) does not conduct electricity on its own.
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Pumice is the only rock that floats on water.
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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.
7
One 75-watt bulb gives more light than three 25-watt bulbs.
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