”We compared the genomes of Papuan people to those of Aboriginal Australians, and discovered that these two populations are actually strikingly distinct from each other. Surprisingly, Papuans and Aboriginal Australians appear to have diverged from each other at least 25,000 years ago, even though the landmasses of Australia and New Guinea were only separated by rising sea levels less than 10,000 years ago.”

Anders Bergström A first author on the paper from the Sanger Institute

https://www.sanger.ac.uk/news_item/genetic-history-aboriginal-australians-and-papuans/