Hot water can freeze faster than cold water.
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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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One ragweed plant can release as many as one billion grains of pollen!
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The inventor of the Super Soaker squirt gun was a NASA Scientist who also helped develop the Stealth Bomber and the Galileo mission to Jupiter.
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4.5 pounds of sunlight strike the Earth each day.
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