Hey chaps, i'm in the process of writing up a timeline that looks at a drastically different Australia.
One such way is that the Aborigines of Australia don't migrate onto the continent...and i'm sure how I can go about that. So, at the moment, i'm looking for ways to prevent the arrival of humans to the continent. Could there be geological events that could happen or more human based? Any advice you can give on that front would be most appreciated.