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Changes around 4,000 years agoEdit
The dingo reached Australia about 4,000 years ago – thought to have been brought here by Asian seafarers – and is believed to have led to the extinction of the thylacine in mainland Australia. Around the same time there were changes in language, with the Pama-Nyungan language family spreading over most of the mainland, and stone tool technology, with the use of smaller tools. Human contact has thus been inferred, and genetic data of two kinds have been proposed to support a gene flow from India to Australia: first, signs of South Asian components in Aboriginal Australian genomes, reported on the basis of genome-wide SNP data; and secondly, the existence of a Y chromosome (male) lineage, designated haplogroup C∗, with the most recent common ancestor around 5,000 years ago.[33]

A 2013 study by researchers at the Max Planck Institute led by Irina Pugach, the result of large-scale genotyping, indicated that Aboriginal Australians, the indigenous peoples of New Guinea and the Mamanwa, an indigenous people of the southern Philippinesare closely related, having diverged from a common origin approximately 36,000 years ago. The same study shows that Aboriginal genomes consist of up to 11% Indian DNA which is uniformly spread through Northern Australia, indicating a substantial gene flow between Indian populations and Northern Australia occurred around 4,230 years ago. Changes in tool technology and food processing appear in the archaeological record around this time, suggesting there may have been migration from India.[34][35]