Uyghurs
Contemporary scholars consider modern Uyghurs to be the descendants of a number of people, including the ancient Uyghurs of Mongolia who arrived at the Tarim Basin after the fall of the Uyghur Khaganate, Iranic Saka tribes, and other Indo-European peoples who inhabited the Tarim Basin before the arrival of the Turkic Uyghurs. DNA analyses indicate that the peoples of central Asia such as the Uyghurs are all mixed Caucasian and East Asian. Uyghur activists identify with the Tarim mummies, remains of an ancient people who inhabited the region, but research into the genetics of ancient Tarim mummies and their links with modern Uyghurs remains problematic, both to Chinese government officials concerned with ethnic separatism, and to Uyghur activists concerned that the research could affect their people's claim of being indigenous to the region.
Migration to Xinjiang
Some Uyghur ultra-nationalist revisionists, worried at the prospect that they are descendants of migrants into Xinjiang and could be seen as invaders and not the indigenous inhabitants, have sought to revise history like Turghun Almas in his book Uyghurlar, claiming that Turkic Uyghurs were always natives of Xinjiang, claiming that the Tocharian Tarim mummies were Uyghurs, claiming Uyghurs invented gunpowder, paper, compass, printing and that Uyghur civilization is 6,000 years old and is the origin of all world civilization.