Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
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Iron weighs more after it rusts.
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4.5 pounds of sunlight strike the Earth each day.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
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In zero gravity, a candle's flame is round and blue.
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The force of a suction cup is calculated using F=AP.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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