Yet they and their descendants would go on to transform Europe and much of Asia genetically, culturally and linguistically. Among the many innovations that these steppe migrants ushered in, scientists believe, are the Indo-European languages that are dominant in Europe today, and which are spoken by nearly half of humanity.
Just going to point out the irony that modern Europeans are descended from migrants that infiltrated the Continent and interbred with the locals until their genes and culture were dominant.