At room temperature, the average air molecule travels at the speed of a rifle bullet.
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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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Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Scientists in Germany have developed a candy that doesn't cause cavities.
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Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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