Ancient Peruvian metallurgy studied

Ancient metal pollution trapped within the mud at the bottom of a lake in Peru reveals the Andean people were smelting copper as far back as 1,000 years ago.

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<p><a href="http://www.physorg.com/news96222703.html">Ancient Peruvian metallurgy studied</a></p> <p>Ancient metal pollution trapped within the mud at the bottom of a lake in Peru reveals the Andean people were smelting copper as far back as 1,000 years ago.</p>