Recently lake Condah in south western Victoria has been added to the world heritage list as on of the ealiest man made stuctures in thd world.
https://www.abc.net.au/news/2019-07-...-list/11271804
Some of the eel traps and stone stuctures are well over 6000 years.
We have so much ancient history here in Australia but we normally just walk over it and build on too of it.
Whilst working on a 1860s "Chinese built"woolshed ive discovered that the local aborigines help build the stone shed not the Chinese who were on their way to the goldfields about 8 years earlier.
At the same time the first aboriginal 11 cricket team went to England from this area and included workers on the station where this woolshed is built.
After the end the decade there was cultural and physical genocide with the last of the indigenous population rounded up into missions and the last of the ancient stone stuctures around the west wimmera destroyed. Luckily some the Budu Bin site was not completely destroyed but ive found old 1850s drawings that show about 30 or more stone huts and a whole eel trap system that was then drained for farmland and the aborigines kicked off.
Years later a nicer stories came to be about with the chinese on the way to goldfields built it or chinamans well etc.
History has been rewitten in such a short time (about 150 years), it could be plausible that an earlier civilization had been in the Americas 11000 years before.
Cheers
Andy