PEOPLING × GENETICS
The Yamnaya Steppe Migration
~5,000 years ago
History · Bronze Age · Holocene · Northgrippian
The Yamnaya, mobile herders of the steppes north of the Black Sea, spread with their wagons and herds from about 5,000 years ago.
The Yamnaya culture is an archaeological culture of the steppes north of the Black and Caspian seas, whose name comes from the Russian yama, pit, after its pit graves covered by a tumulus. Its populations, pastoral and mobile, equipped with wagons and herds, spread from about 5,000 years before present. Ancient DNA records on this occasion one of the most marked ancestry changes Europe has known: within a few centuries, the Corded Ware populations of central Europe draw nearly three quarters of their ancestry from the steppes. That proportion is a mixture estimate and not a headcount: the ancient genome is compared with reference populations, here Europe's first farmers and the steppe herders, and the value retained is the combination of the two that best reproduces the distribution of shared variants.
Why it matters
This inheritance is present in the majority of present-day Europeans and in many South Asian populations. The movement further constitutes the best-supported hypothesis for the diffusion of the Indo-European languages, which include languages from Portuguese to Bengali. Genetic data have settled a century-old debate on the reality of large-scale prehistoric migrations, without determining by which mechanisms, demographic, matrimonial, epidemiological or violent, the ancestry of the newcomers became predominant so rapidly.
Dating & uncertainty
The Yamnaya complex spreads across the steppes from about 3300 BCE; the ancestry change in central Europe is established around 2500 BCE, the Corded Ware populations of Germany then drawing nearly three quarters of their ancestry from steppe herders. The connection to the Indo-European languages remains an inference combining genetic, archaeological and linguistic data, and is not directly observable.
Our species’ history as one day
23:37:0822 min 51 s before midnight
if the 315,000 years of Homo sapiens were compressed into a single day