Block, SkipCaptcha, nsAm_Govt_101RO, nsAm_Govt_101RW, nsAm_Govt_101_ta, nsTeam2RO, nsTeam2RW, nsTeam2_talkRO, nsTeam2_talkRW
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The period in a civilization when that civilization became skilled in working all kinds of metal.
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 in the Middle East and spread across the world.