Ancient-DNA analyses identify a Caucasus Lower Volga people as the ancient originators of Proto-Indo-European, the precursor to the massive Indo-European language family.
The population lived on the Eurasian steppe within the borders of current-day Russia during the Copper Age about 6,500 years ago, data show.
Findings indicate members of the group mixed with people to the west to form the distinct genome of the Yamnaya people, who went on to spread Indo-European languages across the world
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