The winter of 1912 was so cold that Niagara Falls froze over.
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The winter of 1932 in the US was so cold that Niagara falls froze completely solid!
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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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Rain contains vitamin B12.
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The Earth sees about 760 thunderstorms every hour, scientists have calculated.
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