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Science » Earth Sciences » Other Earth Sciences

Mammoth Cave: Its Explorers, Miners, Archeologists, and Visitors

explores a cave in southwestern Kentucky that, with more than 345 miles of explored passageways, is the longest cave in the world. (National Park Service, Teaching with Historic Places)

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Visitors pose with their guide, c. 1900.  (Mammoth Cave National Park)

Visitors, c. 1900


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