A few weeks ago we had a discussion of the Haak et al Science paper
which concluded from ancient DNA of LBK skeletons that the cultural
diffusion model for the spread of farming was more likely. A new paper
in PLoS Biology by Albert Ammerman and colleagues takes the opposite
view. I have not had a chance to read it yet, but I thought members of
this group might find it of interest. Ammmerman, of course, formulated
the demic diffusion model with Cavalli-Sforza.
best, Michael Balter