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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Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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The bark of an older redwood tree is fireproof.
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Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
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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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German chemists made a replica of a trophy the size of one molecule.
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In zero gravity, a candle's flame is round and blue.
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