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Hi there Aprerogative. Reading to your question on Talk:Haplogroup four months later, I think the author of commons:Image:Human_mtDNA_migration.png was thinking of the so-called "Solutrean Hypothesis", which AFAIK is not generally accepted (yet, anyway).
As far as my limited understanding goes, this hypothesis posits migration from prehistoric France to North America by some means. The evidence for this is:
- some resemblance between Solutrean arrowheads in France and those in North America of the same period.
- The presence of mitochondrial haplogroup X in Europe and the Americas. It isn't present in any large quantity in Asia, apparently, which is quite odd given that that's the supposed departure point to the Americas.
See Haplogroup X (mtDNA)#North_America for more info. There is a reference cited to some paper which may also be important. --Saforrest 07:47, 21 February 2006 (UTC)