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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A single speck of dust is half way in size between a subatomic particle and the Earth.
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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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Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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MIT has developed a camera that captures the speed of light at a trillion frames per second.
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The earth is approx. 6,588,000,000,000,000,000 tons.
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In zero gravity, a candle's flame is round and blue.
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