Indian DNA links to 6 'founding mothers'
Those women left a particular DNA legacy that persists to today in about about 95 percent of Native Americans, researchers said.
The finding does not mean that only these six women gave rise to the migrants who crossed into North America from Asia in the initial populating of the continent, said study co-author Ugo Perego.
The women lived between 18,000 and 21,000 years ago, though not necessarily at exactly the same time, he said.
1) That the Paleo-Indians exterminated the megafauna when they arrived in 12,000 BC. That isn't likely if they coexisted with the megafauna for the prior 8,000 years.
2) That Kennewick Man or other alleged non-Indians inhabited the Americas before the Paleo-Indians.