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Before the Soviet era, which began in Central Asia in the early 1920s, the area designated today as the Republic of Tajikistan underwent a series of population changes that brought with them political and cultural influences from the Turkic and Mongol peoples of the Eurasian steppe, China, Iran, Russia, and other contiguous regions.
Tajik Academy of Sciences (official name Academy of Sciences of the Republic of Tajikistan) incorporates 20 research institutes and three territorial groupings: the Pamir Branch in the eastern part of the country (with 2 institutes), the Khujand Scientific Center in the north, and the Khatlon Scientific Center in the south-west.