Ancient DNA reveals the multiethnic structure of Mongolia's first nomadic empire

Long obscured in the shadows of history, the world's first nomadic empire—the Xiongnu—is at last coming into view thanks to painstaking archaeological excavations and new ancient DNA evidence. Arising on the Mongolian steppe 1,500 years before the Mongols, the Xiongnu empire grew to be one of Iron Age Asia's most powerful political forces—ultimately stretching its reach and influence from Egypt to Rome to Imperial China.