A genetic study published in "Nature" in July 2015 stated that "some Amazonian Native Americans descend partly from a ... founding population that carried ancestry more closely related to indigenous Australians, New Guineans and Andaman Islanders than to any present-day Eurasians or Native Americans". The authors, who included David Reich, added: "This signature is not present to the same extent, or at all, in present-day Northern and Central Americans or in a ~12,600-year-old Clovis-associated genome, suggesting a more diverse set of founding populations of the Americas than previously accepted." This appears to conflict with an article published roughly simultaneously in "Science" which adopts the previous consensus perspective, i.e. that the ancestors of all Native Americans entered the Americas in a single wave of migration from Siberia no earlier than ~23 ka, separated from the Inuit, and diversified into "northern" and "southern" Native American branches ~13 ka. There is evidence of post-divergence gene flow between some Native Americans and groups related to East Asians/Inuit and Australo-Melanesians.