[Graeme]

I like those maps even if they are a little unclear. It shows you that Haplogroup I, a UP haplogroup, is quite common in Europe and definitely predates the entry of IE speech into Europa.

I don't have any view on blood group B except it is the least common European blood group. You have to remember that the morality of diseases vary according to blood groups. Europe did have the black death which targets the possessers of blood group B more than any other blood group. The European population was reduced to a third by Yersinia pestis, maybe most of them were B group.