America's Ancient Copper Mines — What the Hopi Recorded
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YouTubeLast Cartographer
America's Ancient Copper Mines — What the Hopi Recorded
For thousands of years, the shores of Lake Superior were home to one of the largest ancient copper mining operations in North America. Long before modern mining companies arrived, unknown miners had already opened thousands of pits, extracted enormous quantities of native copper, and left behind a mystery that archaeologists continue to study ...
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