The winter of 1932 in the US was so cold that Niagara falls froze completely solid!
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The Earth sees about 760 thunderstorms every hour, scientists have calculated.
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Contrary to popular belief, lightning travels from the ground upwards not from the sky downwards.
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Dirty snow melts faster than clean.
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Temperatures have been cooling since 2002, even as carbon dioxide has continued to rise.
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Snowiest city in the U.S. : Blue canyon, California.
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