Human ancestors scattered across Africa separated by forests and deserts. Isolation over millennia created diverse human forms. Stone tools show clustered distributions not from single origin. Fossils reveal archaic features persisting regionally until recently. Genes in living Africans indicate old lineages and high diversity beyond single population capacity. Shifting climates drove cycles of isolation and local adaptation. Sub-Saharan species mirror these deep phylogenetic subdivisions. Modern human features emerged regionally at different times. Material culture modernized continent-wide but regionally. Population structure challenges single ancestral population models. Ancient bottlenecks likely reflect connectivity changes. Africa's evolution was multi-regional and multi-ethnic. All African regions key to human origins.
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