Paleoanthropologists from the University of Vienna and Harvard University have analyzed ancient DNA from 435 individuals from Eurasian archaeological sites... They've discovered a previously unknown group, called Caucasus-Lower Volga (CLV) people, and found out that this population can be connected to all Indo-European-speaking populations.Indo-European languages, which number over 400 and include major groups such as Germanic, Romance, Slavic, Indo-Iranian, and Celtic, are spoken by nearly half the world's population today...These migrations out of the steppes had the largest effect on European human genomes of any demographic event in the last 5,000 years and are widely regarded as the probable vector...