"and who was here, when these wandering wayfarers came here from the south Pacific?...other Aboriginal peoples?????"

Noone Apparently - Depending on the outcome of current research.

Native Americans as we know them today came from North East Asia over the land Bridge that connected the two continents at the time.

That bit is not disputed.

The archeological debate is about who was there first - the Australian Aboriginals or the genetically very distinct North East Asians who drove them out.

"How come they came from there?,"

well thats where they were when their journey began I suppose (?).

As for where australian aborigines came from before that - well - there weren't any ...

Dear GFS - if you think this is interesting and you were previously unaware, then I am pleased fro you. If you don't then I don't really care. If it upsets you then I'm sorry.

I just think its kind of interesting.

Have fun.