This is a great burial mound (Kurgan) from the Bronze Age in the Caspian Steppe. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

With its rolling hills, vast open plains and arid deserts, Mongolia’s Eastern Steppe is one of Asia’s last grassland wildernesses. Great migratory herds of Mongolian gazelle roam here along with 5,000 ...

Their migration accounted for the appearance of "steppe ancestry" in populations ... that lived in the steppes between the North Caucasus mountains and the Lower Volga between 4500BC and 3500BC.