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BTW, distinct Australoid genetic markers have recently been located in India which delineate their migration from Africa to Australia and the lands bordering the Pacific.

I saw part of that TV special and it was fascinating. I can understand the theoretical migration from South Africa to Australia via India. But I have a real problem trying to understand how Australoids could have gotten to the New World. I don't dispute some of the evidence that's emerging (skulls in Mexico, your Tierra del Fuego information, etc.) But fitting it all together with no real corroborative physical evidence (boats, rafts, etc.) taxes my imagination. I think a whole lot was going on about 50,000 years ago that we have no inkling about.

Unfortunately evidence of human settlements by coastal areas degrades rather quickly especially after deglaciation raised the water levels. I suppose early Australoid explorers could have followed the Asian coast
and the Bering land bridge into North America. A direct Trans pacific route seems improbable but cannot be totally ruled out since island hopping was more feasible due to lower ocean levels. The Third possibility is from Africa to Brazil but that is the least likely possibility. Brazil was actually accidentally discovered by India bound Portugese explorers hugging the African coastland and being blown over by storms.