“Contrary to popular belief, North America, and specifically the Great Lakes region, might be where metal technologies were first used by humans. Copper use emerged about 10,000 years ago. Sometime thereafter, people began to mine copper from the bedrock around Lake Superior, the remains of which can still be seen throughout the region today.” ScienceTechnology QuotesHistory Of Mankind Book:Great Water: The Lost Mines of Lake Superior Source: Great Water: The Lost Mines of Lake Superior