They wandered over from somewhere in India a fair while ago (but not as long as they think). Perhaps 50kya they wandered across the exposed (due to low sea levels caused by ice age) land bridge from India to Northern Australia. Once there they started acting like abos, setting fire to shit and killing off all of the large animals. By about 45kya there were effectively no animals bigger than an adult human in the South West of the continent. The abos ate the eggs of giant flightless birds, and hunted the megafauna (likely targeting the more easily overpowered juveniles), leading to a demographic collapse in populations. This is evidenced by fungal spores that are found in sediment layers, these fungi were adapted to growing in the droppings of megafauna, and abruptly disappeared around 45kya, a time when no significant climate change was effecting the area. The only likely explanation is predation by aboriginals. You certainly won't find this information at any museum, where they worship the ground that abos walk on and fucking hate White men. The museums will usually blame "climate change", ironically providing an argument against the supposed "bad White man climate change". There were probably earlier migrations of even more primative hominids but these were either gone by the time abos arrived or displaced/interbred with them. The abos first migrated out of Africa, without interbreeding with either Neandertal or Denisovan species. Whether they interbred with the as yet unknown hominid that Africans did is not really clear, but their lack of either Neandertal or Denisovan interbreeding likely explains their remarkably low average IQs (62).