A wave of archaeological revisionism, fueled in part by unfolding discoveries in South Carolina, is challenging long-held views about the first Americans – who they were, where they came from, when they arrived, and even what happened after they got here.
Generations of students have learned that hardy hunters — ancestors of today's Native Americans — crossed a land bridge from Siberia into Alaska as the last ice age was ending 13,000 years ago and, within several centuries, had spread out across much of North and South America.
But increasing evidence from archeological excavations and new analyses of prehistoric human migrations is testing that once widely accepted view of "coming to America."
Mostly a summary (albeit a pretty decent one) of the several posts on this conference we've put up recently. Gives a good description of the Clovis paradox, too.