This newer information about the Kurgan Culture may actually dispels the myth of Aryan Invasion into India. The 'arya' of India are the Brahmin class and their haplogroup is R1a, which arose 18,500 YBP. As this ancient DNA research of Kurgan burials shows, the Kurgans belongs to the R1a1a7-M458 subclade, which is a mutation off of the R1a haplogroup that arose about 10,000 YBP around Poland. While it's possible that Brahmin Indians are the ancestors of Kurgans, it is NOT possible that Kurgans are the ancestors of Brahmin Indians. The idea that Steppe nomad brought religion to India is now officially dead, if you ask me.
A study published in 2012 states that "R1a1a7-M458 was absent in Afghanistan, suggesting that R1a1a-M17 does not support, as previously thought, expansions from the Pontic Steppe, bringing the Indo-European languages to Central Asia and India." However, this study does not in any way conflict with the hypothesis of expansions from the Pontic Steppe, since the study does not take into account the early wave of the Indo-European speaking people. Even today the R1a1a7-M458 are very rare, almost absent, in the area of the proposed Indo-European origins between the Black Sea and the Caspian Sea; the R1a1a7-M458 marker first started in Poland 10,000 years ago (KYA), and arrived in the western fringes of the Pontic steppe 5,000 years ago and the eastern fringes only 2,500 years ago, while the first Indo-European wave (4500–4000 BC Early PIE) began up to 4,000 years before this.http://en.wikipedia.org/wiki/Kurgan_hypothesis