Earth

How many days a year is the sun invisible at the North Pole?

More Questions from Earth
Which of these African watersheds is the largest in size?
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What are the pilots who guide ship captains to docking areas safely called?
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How long does it take for the Earth to rotate around completely on its axis?
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The "Bergeron process" deals with what kind of precipitation?
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What is compressed moss that turns blackish brown called?
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What type of radar measures radial velocity?
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A 17.5-inch hailstone was recorded in what U.S. state?
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Every second, 100,000 cubic feet of water pours over what?
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