MIT has developed a camera that captures the speed of light at a trillion frames per second.
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One third of the electricity produced on earth is used to power electric light bulbs!
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When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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For every gallon of sea water, you get more than a quarter pound of salt.
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A cubic yard of air weighs about 2 pounds at sea level.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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In zero gravity, a candle's flame is round and blue.
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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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