Where others see only sand and scrub, Sarianidi has turned up the remnants of a wealthy town protected by high walls and battlements. This barren place, a site called Gonur, was once the heart of a vast archipelago of settlements that stretched across 1,000 square miles of Central Asian plains. Although unknown to most Western scholars, this ancient civilization dates back 4,000 years—to the time when the first great societies along the Nile, Tigris-Euphrates, Indus, and Yellow rivers were flourishing. Thousands of people lived in towns like Gonur with carefully designed streets, drains, temples, and homes.