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
A ball of glass will bounce higher than a ball made of rubber.
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According to studies, men change their minds two to three times more often than women.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
One 75-watt bulb gives more light than three 25-watt bulbs.
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Pumice is the only rock that floats on water.
14
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
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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