Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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No matter how cold it gets, gasoline will not freeze.
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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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One ragweed plant can release as many as one billion grains of pollen!
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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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Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
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Indoor pollution is 10 times more toxic than outdoor pollution.
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