Good topic not not such a good article in my humble and (as usual) uninformed opinion.
What was wrong with the article? Firstly it fails to consider the many waves of different peoples who migrated through Indonesia and New Guinea over the many many thousands of years. If waves of people migrated through islands and land masses the north of Australia, some of them invariably migrated through Australia as well.
There is, I loosely recall evidence that advanced Homo Erectus utilised boats and was a skilled toolmaker in areas of what is now the Indonesian achipelago. It would be wrong for use to consider ourselves too far superior to these people (in any case we probably carry some of their blood line).
A second major problem with the article is an assumption that one or more of the waves of Austaliod race "wiped out" the pre-existing inhaitants. More likely, there was intermingling ... as there was in Europe between Cromagons Neanderthals, and possibly others. An outcome of tribal conflict could be the kidnap of women in Australia as in Europe. In those days, population densities were very low.
Is the wave theory true? Consider not just the fossil evidence but also the indigenous and unique Australiod peoples of far southern quarters (Southern Sri Lanka, Tasmania, Tierra del Fuego).
Stipping silly politics out of it all, the world has always been a mixing pot.
