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Temporal distribution of the 210 14C dated fossil musk ox used in the present study. For a number of individuals, indicated by the extended timelines, finite dates could not be calculated. Samples are grouped in five major regions: Northeast Siberia, Taimyr, Urals, Canada, and Greenland. The approximate earliest presence of anatomically modern humans in the regions is added for comparison. Radiocarbon accession numbers associated with specific specimens are given in Table S1.
