"Eras"

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  • ~500k BC — fire
  • ~8k BC — crops and working animals
  • ~6k BC — trade
  • ~5k BC — metal
  • ~4k BC — wheel

First millennium AD

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Second millennium AD — part 1

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15th century

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16th century

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17th century

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18th century

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19th century

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20th century

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21st century

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See also

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