At https://phys.org/news/2021-03-australasian-genetic-wider-south-america.html … Australasian genetic influence was widespread in South America, much more than previously thought. That is the claim. Not only is it apparent in the Amazon rainforest zone but has been discerned across a wide spectrum of South America, including Patagonia for example. These peoples early on inhabited both South Asia [including India] and probably SE Asia as well as the Melanisian islands [such as the Solomons], New Guinea and Australia. How did they get to the Americas? It's a long way across the Pacific but they may have crossed by the same route as Siberians, somewhat later. Hence, they must have made the shift prior to the Late Glacial Maximum, we might hazard a guess. If so, what link do they have with the Denisovans, known to have inhabited southern Siberia, known contemporaries of the Neanderthals. If so, anthropologists may have to re-imagine a migration prior to 40,000 years ago. This would be remarkable. As yet, no accepted archaeological evidence of a migration that early exists. Keep an eye out for updates on the subject. Not only would they have been replaced in Siberia but later, were displaced in the Americas, if there is any substance in this speculation.
Meanwhile, at https://phys.org/news/2021-03-modern-analysis-art-machine-doors.html … modern analysis of rock ar used machine learning. Archaeologists used this method to chronologically arrange Aboriginal rock art in Arnhem Land. Machine learning and computer modelling of m ore than 1000 different depicted objects such as dogs, cats, lizards, chairs, tables, cups, and so on, and analysing a total of over 14 million photographs of the rock art. That is a lot of photographs.