Fig. 7. Synthesis of palaeontological, archaeological, climatological, and megafaunal sedaDNA data.

Source data are provided as a Source Data file, see the following references for original data sources. A Dated fossils of select megafaunal taxa in eastern Beringia¹⁶⁵, see Supplemental Fig. 1. B Earliest archaeological sites in northwestern North America¹⁸⁸, see Supplemental Figs. 2–3 and Supplemental Table 2. C Central Yukon permafrost samples analyzed in this study with 2σ modelled age ranges, see Supplementary Figs. 5–7. D Greenland Ice Sheet Project 2 (GISP2) oxygen isotope profiles at 2 m intervals¹⁸⁹. E Onset of the Younger Dryas, and alleged cosmic impact hypothesis¹⁹⁰.