es of the Science journal said that this was the first evidence of the case when the characteristic features of other primitive people, perhaps, turned into advantages for the modern humans.
However, not all scientists share the view of the Californians and are not willing to regard the issue as solved. The young but already quite well-known geneticist David Reich from Harvard University indicates that there may be other possible explanations for why HLA variants are distributed differently among the inhabitants of the globe. Incidentally, a group of scientists from Stanford University that made such a sensational statement, too, does not rule out other alternative models.
In addition, it is still not entirely clear whether the Neanderthals and the Denisovans were members of other species of the Hominidae family, or whether they should be treated as subspecies of Homo sapiens. On the one hand, the genetic differences between them and us are approximately the same as between humans and chimpanzees that are clearly not a subspecies of H. Sapiens. On the other hand, the possibility of interbreeding between different species with further offspring is still unlikely. So, it is possible that the "gene borrowings" of the modern humans are simply an exchange of genes among different populations of one species.