[Varda]

The gist is that the original finding (X was euro mtDNA) was the result of a sample size that was too small.

This study has a large sample size from most geographic locations. Result was that they found X in Africa, Europe, Asia and America. To me, the most interesting thing is that Native American haplogroup X is not closely related to any old World sample. They suggest dates for divergence not later than 11,000 ya and no earlier than 25,000 ya.

[blam]

Take this trip, Journey Of Mankind, that was derived from the DNA studies of Professor Stepen Oppenheimer. Notice he has a human entry to North America around the 25,000 year ago time frame. Also, notice that they became isolated in North America (Meadowcroft) during the Last Glacial Maximum (18-23,000 YA).
It is my opinion that these people are the probable source of the halogroup-X in the Americas and the Obijawa(sp) Indians in that region have the highest percentage of the halo-X of all others in the Americas.

I don't rule out the possibility that some Halo-X may also have arrived from across the Atlantic.