Population reconstructions for humans and megafauna suggest mixed causes for North American Pleistocene extinctions.

Nat Commun · 2018 · PMC6303330 · PMID 30575758

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In contrast, the relationship between the human and sloth SPDs is positive and highly significant ( r s = 0.35, P < 0.0001), suggesting those populations fluctuated together from extrinsic factors.

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