[snip] ...ancient livestock herders called the Yamnaya who rode wheeled chariots and spoke a proto-Indo-European language -- also moved across Europe more than 1,000 years earlier. Somehow, they left their genetic signature with most European men, but not women, earlier studies suggest.
The new data confirm a long-held but controversial theory that Sanskrit, the ancient language of Northern India, emerged from an earlier language spoken by an influx of people from Central Asia during the Bronze Age...
...while North Indian languages are predominantly Indo-European, South Indian languages mostly belong to the Dravidian language family... In the early 1900s, British archaeologist Mortimer Wheeler proposed that these Aryan people may have conquered, and caused the collapse of, the mysterious Indus Valley Civilization that flourished in what is now India and Pakistan...
...The genetic makeup of the Y chromosome dramatically shifted about 4,000 to 3,800 years ago, the study found. About 17.5 percent of Indian men carry a Y-chromosome subtype, or haplogroup, known as R1, with the haplogroup more dominant in men in the north compared to the south of India...
"It's very easy for Y-chromosome composition to change very quickly," Richards told Live Science. "Just because individual men can have a lot more children than women can." [/snip]
Aryan Invasion May Have Transformed India's Bronze-Age Population
By Tia Ghose, Senior Writer | July 6, 2017 07:38am ET
https://www.livescience.com/59703-north-india-populated-by-central-asian-invaders.html
