The activists are full of garbage. Either the aborigines were once something much more than what Captain Cook found, and a drought crushed their society to the stone age, then a change of belief kept them there, or there were other people here.

Note that if an aboriginal baby is adopted by westerners, they become just like their new family. I have met a few of these. The only difference is the skin colour. Yet there are how many instances of aboriginal children taken out of school for doing too well (in Dubbo particularly), so they don't become "like the whites", or aborigines who do well at whatever their job is, and the culture demands they share it all with people who don't work. And so on.

If you're in NSW, take a trip to Pyramul one day. It's farmland with no public picnic spots or anything, but from the road, look at Mt. Pyramul. It's on private land and a pyramid, North, South, East and West, earth and steep. That's not natural. One day, when the activism is gone, an archeologist will dig it, or pay for a flyover by a geophysics outfit (ground penetrating radar).

There are lots of other sites too, but if you search 'pyramids in Australia' you get hit with all sorts of rubbish, mystics who make things up and political activists who cover up, and there's the madman with a book to sell. Facts don't seem to matter. An archeologist dug at the so-called Gympie Pyramid in Queensland and found it's an artificially terraced hill (not pyramid) used for iron ore mining and smelting in ancient times - by people who didn't have bellows. Yet you don't hear about it (I just searched for it online and couldn't find the link).