surely you aren't saying that current euro cultures are "original". perhaps you're saying that previous cultures were more/more-often absorbed and incorporated?

I think the lack of awareness is more due to the lack of written records.

I'm not so sure that I would say that there is no "awareness", and if there is a lack of awareness- it seems more likely that the lack of awareness is due to the fact that everyone is self centric, Europeans are going to be more aware of European history, in the same way that having grown up in a very specific region of the US, I am more well versed in the local native history than someone that wouldn't be. For instance, in elementary school, we went to visit native burial mounds and were educated on the local native history. All the native names for roads, towns, etc, they were local tribes that we learned about.

Which definition of "aboriginal" are you using here? If you're simply referring to the indigenous people of Australia, it seems a tautology that they didn't exist in Europe. And if you're using aboriginal as an umbrella term for all indigenous people, it seems foolish to me to think that there never were indigenous people in Europe.

Also, you might want to look up the etymology of the word you're using: https://en.wikipedia.org/wiki/Aborigines_(mythology)

> The Aborigines in Roman mythology are the oldest inhabitants of central Italy, connected in legendary history with Aeneas, Latinus and Evander.