Themis wrote:There is a real impasse with bomgeography. He likes to use DNA science, but then asserts without evidence that they are all wrong about dating, and wildly wrong. I suspect he may be a YEC. This is why he will keep asserting the genetic connection is close in time, since humans have only been around for 6000 years. If one accepts the science which informs us the earth is billions of years, one has no problem accepting the science of how they date DNA. This science informs us the genetic relationships are 10's of thousands of years old. He won't spend some real time to understand how the science really works. That is not his interest.
Strongly agree Themis.
For anyone reading this thread who is interested in what the scientists are saying, here is the link to Dr. Jennifer Raff and Dr. Deborah Bolnick's recent published article about the very topic that David McKane is twisting and distorting concerning Iran.
Does Mitochondrial Haplogroup X Indicate Ancient Trans-Atlantic Migration to the Americas? A Critical Re-Evaluation
http://www.tandfonline.com/doi/full/10. ... 0000000040Specifically, this quote from the above linked study leave's David's argument without any foundation:
To differentiate between a Solutrean and Beringian
source for X2a, one must look instead at the phylogeography
of the most recent ancestors of X2a (Figure 1).
X2a’j is the clade that unites X2a and its nearest sister
clade, X2j (Fernandes et al. 2012; Reidla et al. 2003).
The geographic distribution of X2a’j haplotypes —
especially those with some of the defining mutations
for X2a (indicating that they belong to the lineage
that led to X2a) — would be informative to this question,
but no contemporary or ancient individuals
belonging to these lineages have been identified, with
the possible exception of one individual from Iran
with the X2a’j defining transition at mitochondrial
nucleotide position 12397. However, because this transition
has been observed in other haplogroups and is
known to occur recurrently, it is unclear if this
Iranian individual belongs to the X2a’j lineage or
not (Reidla et al. 2003). X2a’s sister clade, X2j, is
also extremely rare, being found in just a few contemporary
individuals from Iran and Egypt (Fernandes
et al. 2012). It is possible that the common ancestor
of X2a and X2j originated there, but without identifying
more individuals bearing X2j or X2a’j lineages,
any inferences about the geographic origins of X2a’j
or X2a are very tenuous.This link is for a podcast that featured Dr. Jennifer Raff discussing the above published article.
http://www.archaeologypodcastnetwork.co ... ntasies/50Here is a breakdown of the podcast:
12:20 begins haplogroup x, lost civilizations dvd mentioned, Jennifer explains why it is not correct
17:30 explains why people began speculating that haplogroup x was a marker of migrations from Europe or the Middle east, she explains why this is now known to be wrong.
18:40 mentions the molecular clock and how non-scientists still try to argue about it
19:00 Jennifer mentions that haplogroup x2a shares a last common ancestor with other x2s at about 14,000 years, x2 itself common ancestor is about 22,000 years ago.
19:20 Ken Feder points out that the molecular clock estimates fall in the ballpark of the archaeological record from radiocarbon dating.
20:30 discusses how many of the ancient skeletons found in North America have been genetically sequenced.
22:00 begins discussing Solutrean and Clovis first hypothesis'.
26:00 mentions haplogroup x claims of influx from Europe (Meldrum)
27:20 Jennifer explains what her paper was a response to
28:00 the problem is that the lineages in Europe are not ancestral to the American lineages. They are cousins, not ancestral.
32:00 discusses what evidence would be needed to support a European migration and that it is not found.
32:40 points out that Kennewick man is the oldest haplogroup x found in the Americas and his location puts him in line with the current models of the peopling of the Americas.
33:00 No evidence that haplogroup x trickled in from Europe.
34:00 Ken points out that the great lakes distribution of haplogroup x is claimed by some to be evidence of a European migration but it is silly because that location is almost center in the land mass of North America so does not support an East coast arrival. Jennifer then mentions that it could support an interior land migration through Beringia instead of a sea coast migration.
34:45 Ken points out that x originated in Eurasia and migrations made it into europe, other migrations made it to the Americas. Jennifer concurs but points out that was very ancient, long before the migrations into America.
36:00 haplogroup x is not a european group, it's younger lineages are what is found in the numerous world locations.
36:38 haplogroup x does not prove white supremacy, it is not even a european haplogroup to begin with. the white european gene pool didn't even evolve until about 8,000 years ago.
37:30 we don't see any of the pre-columbian genes from europe in the americas.
38:00 Ken points out how white supremists take the science claims of solutrean and twist it into the racist claims. the scientists aren't promoting racism, it is the fringe groups that twist it.
39:00 Ken points out the difference between science hypothesis that could be wrong and the crazy claims of fringe folks.
40:20 important to make the distinction between legitimate scientists and racists.
40:40 the racism is by trying to insert pre-columbian europeans into american indian history.
40:45 the people saying it are not necessarily racist but what they are proposing and claiming is.
43:15 Ken points out that the claims of white people coming in to ancient america are recent, even a current member of the us house of representatives recently made a claim that white europeans are superior. Ken points out that this nonsense and BS needs to be stopped.
44:40 talks about home genetic tests and the claims of being 26% native american.
46:00 mentions Kim Tallbear's work about these claims and white people trying to appropriate American Indian culture.
46:40 mentions Deborah Bolnick's work on these false claims too.
47:25 Jennifer explains the problems with these claims in terms of the DNA.
49:00 ancestry is not identity. the tests don't really tell you who you are.
49:30 points out that this is very important for American Indians because of the admixtures and conquest but their current dna is not who they really are. trying to give a current marker to claim who they are is not valid. also those who are trying to get tribal affiliation through genetics is wrong because you have to be part of the tribal community. you can't just take a dna test and claim that American Indian is your identity.
51:30 DNA can't break a person down to a specific tribe.
52:40 Ken points out those who say "gee, you don't look Indian" and why this is wrong.