The Earth's atmosphere weighs about 5.5 quadrillion tons.
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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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Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
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The average temperature at 40,000 feet above sea level is -60 F.
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The sun is 330,330 times larger than the earth.
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A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Hot water can freeze faster than cold water.
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Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15