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© David Meltzer Evolutionary biologist Greger Larson flanks a whiteboard in his office at Oxford as he and his co-authors turn it into a palimpsest in November 2018 for their PNAS study. Human events are marked in blue and dog events in orange, with northeast Asia on the left and North America on the right. Co-author David Meltzer says it s what scientific convergence sometimes looks like. The study uses newly discovered archaeological sites and human-genome work to assert connections stretching further back than archaeological, paleontological, and other biological evidence could previously establish with any certainty. Audrey Lin from the Smithsonian s National Museum of Natural History, who was not involved in the study, told RFE/RL:

United statesCzech republicNordrhein westfalenWaals gewestOrenburgskaya oblastSaudi arabiaIllinois riverAudrey linLaurent frantzEttore mazzaAngela perriGreg larsonGreger larsonPeter savolainenBering straitDavid meltzer