Indo-Europeans from Northern India and Central Asia?

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I received a PDF from Academia Edu with the title

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Xiao Zhang
Comparative Linguistics
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[TD="class: center, align: center"][COLOR=#4b4b4b !important][FONT=&quot]Did Old Europeans and Indo-European languages come from Central Asia at the Neolithic


It's full of surprising interpretations, to me at least -
what would be your take, if you can read the paper?

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