The standstill in a migration that began in this modern-day country is suggested by surprising stratigraphy of the human presence at Bluefish Cave; theories arguing that that migration originated in this country are further supported by the genes of the Anzick Boy. The earliest known chariots were found at this country’s type site of Sintashta, which names a horse-domesticating culture (-5[1])associated with the Arya that later settled in India. A well-supported model that begins a migration in this country is opposed by the Solutrean hypothesis. This is the largest country that the steppe hypothesis considers the homeland of the Proto-Indo-Europeans. For 10 points, name this country that was on the western end of the proposed land bridge of Beringia (10[2])that the ancestors of Native Americans used to cross the Pacific Ocean. ■END■ (10[1])