Genome-wide DNA analysis proves gene flow from India to Aboriginal Australians 4,000-5,000 years ago. Australia was not isolated after initial human arrival 40,000 years ago. Ancient genetic link exists between Aboriginal Australians and New Guineans from Sahul landmass 35,000-45,000 years ago. Indian migrants likely introduced dingoes, matching fossil record timing. Microlith stone tools appeared simultaneously, probably brought by Indians. Genetic markers across the genome confirm Indian genetic contribution to Australians. No direct route evidence, but contact is undeniable. Tool technology and new animals link to Indian arrivals. Aboriginal DNA shares substantial Indian ancestry beyond ancient Sahul origins.