لایه‌ی چهارم: زبان و خون

References: Lazaridis I et al. (2016), Nature 536. Genomic insights into the origin of farming in the ancient Near East. Damgaard PdB et al. (2018), Science 360. The first horse herders and the impact of early Bronze Age steppe expansions into Asia. Sims-Williams N (2007), Bactrian Documents from Northern Afghanistan, vol. II. Guarino-Vignon P et al. (2022), Scientific Reports 12:733. Genetic continuity of Indo-Iranian speakers since the Iron Age in southern Central Asia. Di Cristofaro J et al. (2013), PLoS ONE 8:e76748. Afghan Hindu Kush.#ایران #DNA #تاریخ #سغدی #پشتون #تاجیک #کرد #اوستی #جاده_ابریشم #میهن