Australian Aborigines descend from modern Humans just as Europeans and Asians do. Genetically that is trivial to show. Also we interbreed easily. So there is no

Australian Aborigines descend from modern Humans just as Europeans and Asians do. Genetically that is trivial to show. Also we interbreed easily. So there is no benefit for any use of the term "speciation". Their "genotype and physiology" isn't that unique by the way. Genotypically there are tribes in Africa that diverge more from each other than Europeans diverge from Aborigines. People who think otherwise tend to overvalue skin color...