The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
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Research indicates that plants grow healthier when they are stroked.
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
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Pumice is the only rock that floats on water.
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The average temperature at 40,000 feet above sea level is -60 F.
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