In 2013, a group of scientists published a study that purported to show an influx of genes from India to Australia 4,000 years ago. They claimed that the ancestors of modern Indians - precisely the Dravidians - sailed to Australia. The Dravidians are the inhabitants of southern India. They occupy the lowest castes in society, due to their absurdly low cognitive abilities. Together with genetically similar peoples, they make up 3/4 of India's modern population. They were so primitive that our cousins the Arians had to create a caste system, in order to block gene flow. Scientists claimed that it was these Dravidians who, 4,000 years ago, took an oceanic voyage and sailed to Australia. A new study has ruled out that possibility. Aborigines from about 50,000 years ago until the arrival of whites 200 years ago had no external gene admixture. The previous team probably assumed wrong values for the average age of the population, and several other errors. - So much for the abstract, but I'll add from myself, because the author in 2016 couldn't because it wasn't yet known: it's likely that the genes of the Dravidians were assumed to be those of the Denisovans, incidentally getting the dating wrong - or making a deliberate mistake to make it agree with the presumed arrival of the Dingo dogs. It was only a year ago that the full genome of the Denisovans was sequenced, so we know that 8% of the genes of Aborigines, Papuans and 4-6% of the genes of South Asians including Dravidians, Filipinos, are from Denisovans. It's these genes that the previous team could consider the Dravidian influx, where the influx wasn't just those 50,000 years ago they were just those Denisovans until white men came and impregnated their women incorporating them into the Homo sapiens species.