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A comment on Evidence for European presence in the Americas in AD 1021. Parent comment

Re:Evidence for European presence in the Americas in AD 1021 by heavyset_go on Wednesday October 20, 2021 @04:21PM (#28935928)
Population density and totals, and their proximity to animals and their waste, matter. Extensive trade and empire building exposes people to new pathogens and allows new ones to develop, as well.
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