Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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A cesium atom in an atomic clock beats over nine billion times a second.
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
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Liquid TIDE laundry detergent glows under a blacklight.
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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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Cold water weighs more than hot water.
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One 75-watt bulb gives more light than three 25-watt bulbs.
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