technology #Science #AncientPeopleDidStuff #Anthropology #Archaeology #Inca #IncanEmpire #IndigenousAmericans #IndigenousCommunities #IndigenousSouthAmerica #Khipu #PreColumbianCivilizations #Science #Wari Incan numerical recordkeeping system may have been widely used Ars Technica Thu 2m read
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