Every year, Alaska has about 5,000 earthquakes.
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The Amazon rainforest produces more than 20% the world's oxygen supply.
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More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
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Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
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The Caspian Sea is also classed as the world's largest lake.
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The state with the longest coastline in the Continental U.S. is Michigan.
31
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109