لایه‌ی دوم: استپ

References: Narasimhan VM et al. (2019), Science 365 — formation of human populations in South and Central Asia (n=523 ancient genomes). Librado P et al. (2021), Nature 598 — origins and spread of domestic horses from the Western Eurasian steppes.#ایران #DNA #تاریخ #استپ #هندواروپایی #میهن