Are aboriginal Australians and New Guineans the modern-day descendants of the extinct species Homo erectus?

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Are aboriginal Australians and New Guineans the modern-day descendants of the extinct species Homo erectus?

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Some scientists have hypothesized that Australian aboriginals received a portion of their DNA from an ancient hominid species called Homo erectus, which for a short time was contemporaneous with modern man. A recent study published in PNAS (Proceedings of the National Academy of the Sciences) set out to answer this question by analyzing mtDNA and Y-chromosome samples from aboriginals. A total of 172 mtDNA and 522 Y-chromosome previously published and new sequences from aboriginal Australians and New Guineans were analyzed for mtDNA and Y-chromosome variation and were compared to the current world haplogroup tree. All of the mtDNA sequences were members of the M and N founder branches, and all of the Y-chromosome sequences fell into the C and F founder branches. The results suggest that the Australian aboriginals are descendants of the same emigrant group that left Africa 50,000 to 70,000 years ago and populated Europe and Asia. At least from the small number of samples analyzed for thi

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