Earth
What organic material is formed from decaying organisms that mix with rocks?
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From which does the Global Positioning System receive its information?
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In which country is Fiordland, which contains the Milford Sound fiord, located?
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In which U.S. state was the prehistoric proglacial lake Glacial Lake Missoula located?
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What is petroleum as found in the earth, before it is refined?
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What submersible helped to discover the wreckage of the Titanic in 1986?
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