Circumhorizontal arcs (loosely known as fire rainbows) are the rarest of all naturally occurring atmospheric phenomena.
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The speed of a typical raindrop is 17 miles per hour.
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The Earth sees about 760 thunderstorms every hour, scientists have calculated.
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Snowiest city in the U.S. : Blue canyon, California.
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In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
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Dirty snow melts faster than clean.
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