In other words, the aboriginal ancestors separated from the evolutionary lineage of the rest of humanity before the emergence of the population hitherto considered common to all mankind. Its genes, in a form not much altered, survived among the aborigines cut off from the rest of humanity. White people who arrived in Australia found an early stone age characteristic of hominids. No hominid left the Stone Age on its own. Symptoms of a transition to the Neolithic, or at least the late Stone Age, appear only in habitats of modern humans. The spread of this type of habitat occurred in parallel with the emergence of cro-magnon, or modern man, and genetically just white European man. About 40k years ago. I wonder if the 21st century is crazy enough to find a European woman who would voluntarily give birth to an archaic australoid. After all, only 70 years ago it was unheard of for her to give birth to a negroid, and now it is taking place - a completely unprecedented thing.