c. 3,600 BCE
Technology
Indus and Levant
Lost-wax casting
Craftworkers modelled objects in wax, encased them in clay and cast metal in the void.
Why it mattered
Allowed complex metal forms far beyond simple moulds.
Stone Age
3,600 BCE
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Nearby in the record
c. 4,000 BCETransportation
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Sailing ships
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South Asia
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Bronze alloying
Southwest Asia
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Otzi's toolkit and tattoos
Alps