Bronze Age spread of Yamnaya Steppe pastoralist ancestry into two subcontinents—Europe and South Asia, and location of the Afanasievo culture, which has the same genetic characteristics as the Yamnayas. (en)
These movements of both Tocharians and Iranians into East Central Asia were not a mere footnote in the history of China but... were part of a much wider picture involving the very foundations of the world's oldest surviving civilization." (en)