Al, with all due respect, I am not aware of that evidence, and would love to see a source. As far as I know (and I am not an expert) the Upper Paleolithic Revolution, or the GLP began in Africa, and one of its results was the migration out to the Middle East, then Europe and Asia and Australia. So, all H. Sapiens, including Australians are “children” of the same UPR event, if that’s what it was. My understanding of the date was something between 70,000 (around the time of a major volcanic event leading to climate change) and 50,000 ya. Some anthropologists even doubt there was even a sudden event at all. I dont know, but would love to see the references you mention.