Who were the Proto-Indo-Europeans?

Formerly the existence of the Proto-Indo-Europeans (formerly referred to as Aryans) was based purely on linguistic evidence, but recent analysis of DNA of the Yamnaya culture, demonstrates their genetic legacy on Indo-European cultures in a timeframe that matches the expansion proposed by linguists.

Most interesting of all, despite the fact these people started off in the Pontic Caspian steppe of Eastern Europe, modern populations in all of Northern, Central and Eastern Europe all have a strong genetic affinity with them.

This video explains what genetic and linguistic evidence tells us about how they lived, what they looked like and what their pagan religion was like.

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Sources:
Massive migration from the steppe was source for Indo-European languages in Europe
http://www.nature.com/nature/journal/v522/n7555/abs/nature14317.html
Steppe people had healthy genes
http://biorxiv.org/content/early/2017/06/02/145193
90% of British DNA replaced in Neolithic by steppe descended invaders
http://eurogenes.blogspot.se/2017/05/the-bell-beaker-behemoth_10.html
3 populations make up modern Europeans
https://drive.google.com/file/d/0B016wEaS0EWqMGxGSTBTc3VxVVU/view
Culture and language among Corded ware people
https://drive.google.com/file/d/0B016wEaS0EWqMDVyQUlQb1hUY28/view
https://drive.google.com/file/d/0B016wEaS0EWqX2hCNHZzS09kZWc/view

Видео Who were the Proto-Indo-Europeans? канала Survive the Jive