ABSTRACT This article aims at reconstructing history of R1a1 ancient migrations between 20,000 and 3500 years before present (ybp). Four thousand four hundred sixty (4460) haplotypes of haplogroup R1a1 were considered in terms of base (ancestral) haplotypes of R1a1 populations and timespans to their common ancestors in the regions from South Siberia and northern/northwestern China in the east to the Hindustan and further west across Iranian Plateau, Anatolia, Asia Minor and to the Balkans in Europe, including on this way Central Asia, South India, Nepal, Oman, the Middle East, Comoros Islands, Egypt, etc. This study provides a support to the theory that haplogroup R1a arose in Central Asia, apparently in South Siberia and/or neighboring regions, around 20,000 ybp. Not later than 12,000 ybp bearers of R1a1 already were in the Hindustan, then went across Anatolia and the rest of Asia Minor apparently between 10,000 and 9000 ybp, and around 9000 - 8000 ybp they arrived to the Balkans and spread over Europe east to the British Isles. On this migration way or before it bearers of R1a1 (or the parent, upstream haplogroups) have developed Proto Indo-European language, and carried it along during their journey to Europe. The earliest signs of the language on passing of bearers of R1a1 through Anatolia were picked by the linguists, and dated by 9400 - 9600 - 10,100 ybp, which fairly coincides with the data of DNA genealogy, described in this work. At the same time as bearers of the brother haplogroup R1b1a2 began to populate Europe after 4800 ybp, haplogroup R1a1 moved to the Russian Plain around 4800 - 4600 ybp. From there R1a1 migrated (or moved as military expeditions) to the south (Anatolia, Mitanni and the Arabian Peninsula), east (South Ural and then North India), and south-east (the Iranian Plateau) as the historic legendary Aryans. Haplotypes of their direct descendants are strikingly similar up to 67 markers with contemporary ethnic Russians of haplogroup R1a1. Dates of those Aryan movements from the Russian Plain in said directions are also strikingly similar, between 4200 and 3600 ybp.
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