The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
Sound travels about 4 times faster in water than in air.
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When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The only letter not appearing on the Periodic Table is the letter "J".
180
Most liquid laundry detergents are alive with living organisms that help to break down stains!
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