PIE vs. Proto-World (Proto-Language)

[petegray]

In reply to Rick:

Granted, and I apologise for misunderstanding your contrast between Africans
and modern humans.

Incidentally, where do Australian Aborigines fit into this?  Wasn't there
some evidence (or suggestion) in the news about 18 months ago, that the
Aborigines were very much older than had been previously thought?   How do
the time scales fit together?

Pete