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      Knowledge is Power

      Scientific American July 1991

      Copper-Alloy Metallurgy in Ancient Peru

      More than 1,000 years ago civilization in South America was forged out of copper alloys. Recent excavations have revealed many aspects of copper-alloy metallurgy, from mining to smelting to metalworking

      • By Izumi Shimada, John F. Merkel on July 1, 1991

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      More in the July 1991 issue of Scientific American
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      • Insectoids Invade a Field of Robots
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