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3500 B.C. began with [[copper]] tools, then 2500 B.C. superior [[bronze]] tools, then 1200 B.C. superior [[iron]] tools.
3500 B.C. began with [[copper]] tools, then 2500 B.C. superior [[bronze]] tools, then 1200 B.C. superior [[iron]] tools.
[[category:anthropology]]
[[category:anthropology]]
[[Category:Archaelogy]]