Approximately 50% of people on this planet speak a language that is classified as Indo-European in origin. The origins and the spread of this language group has long been a source of scholarly discussion.
This video positing answers to the questions concerning the origin and spread is graphically illustrated in this video:
https://www.youtube.com/watch?v=KdQwalCPNAs
(Quote): The conventional view places their homeland in the Pontic steppe, which corresponds to modern-day Russia, Ukraine and Kazakhstan. An alternative hypothesis claims that the Proto-Indo-Europeans spread from Anatolia in modern-day Turkey.
The latter hypothesis was recently backed up by a seminal study led by evolutionary biologist Quentin Atkinson from the University of Auckland in New Zealand, which was published in the journal Science." (unquote)
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