The Earth sees about 760 thunderstorms every hour, scientists have calculated.
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Oak trees are struck by lightning more than any other tree.
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The speed of a typical raindrop is 17 miles per hour.
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-40 degrees Celsius is equal to -40 degrees Fahrenheit.
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Moist air holds heat better than dry air.
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The winter of 1932 in the US was so cold that Niagara falls froze completely solid!
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The winter of 1912 was so cold that Niagara Falls froze over.
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Snowiest city in the U.S. : Blue canyon, California.
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