Where lies the origin of the Indo-European language family? Ron Pinhasi and his team in the Department of Evolutionary Anthropology at the University of Vienna contribute a new piece to this puzzle in collaboration with David Reich's ancient DNA laboratory at Harvard University.

The title is a bit clickbaity but the article is interesting. Quick summary:

A new ancient population was recognised, based on genetic data. This population has been called the Caucasus-Lower Volga population, or “CLV”. They were from 4500~3500BCE, tech-wise from the Copper Age, and lived in the steppes between the North Caucasus and the Lower Volga. .

About 80% of the Yamnaya population comes from those people; and at least 10% of the ancestry of Bronze Age central Anatolians, where Hittite was spoken, also comes from the CLV population. The hypothesis being raised is that the CLV population was composed of Early Proto-Indo-European speakers (the text calls it “Indo-Anatolian”).