{{stub}}The period in a civilization when that civilization became skilled in working all kinds of metal and used [[copper]] or [[bronze]] tools. It began in 3500 BC in the Middle East and spread across the world.
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{{stub}}The period in a [[civilization]] when that civilization became skilled in working all kinds of [[metal]] and used [[copper]] or [[bronze]] tools. It began in 3500 BC in the [[Middle East]] and spread across the world.