Australians are very old race/Ethnie/clad

The Australian-specific distribution of the five haplogroups identified indicates genetic isolation over a long period.

Ancestral connections within Australia are deeper than those reflected by known linguistic or culturally based affinities.

.......support a continuity of presence for the descendants of a founding population already established by 40,000 years ago.

SEE ALSO:

http://zescrap.blogspot.com/2006/02/analysis-shows-three-human-migrations.html