Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
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One 75-watt bulb gives more light than three 25-watt bulbs.
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The hair of an adult man or woman can stretch 25 percent of its length without breaking.
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In zero gravity, a candle's flame is round and blue.
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In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
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The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
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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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