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 aren't sure what color dinosaurs were.
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The bark of an older redwood tree is fireproof.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
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There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
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4.5 pounds of sunlight strike the Earth each day.
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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
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