[ElkGroveDan]

I don't believe that the South American Indians have diverged from their Mongolian ancestors sufficiently to account for 50,000+ years of seperation, but that's pure speculation on my part.

Though there were people there that long ago, nothing says they had to be the genetic ancestors of the current inhabitants

[Batrachian]

I'm not sure I follow you. Are you saying that the American Indians are not necessarily descended from Asians, or that the more modern Indians are not descended from the first inhabitants of the New World, possibly from 50,000 years ago?

BTW, did you read the statement by the scientist about how her findings are a blow to "U.S. imperialism"? Kind of makes you wonder about her scientific detachment, not to mention integrity.