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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There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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One cubic foot of gold weighs more than 1,200 pounds!
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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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The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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Billions of neutrinos pass unnoticed through your body every second.
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