From Yahoo News:

JINSHA, China (AFP) – Day after sweltering day on the banks of the Modi stream, archeologists are dealing shattering blows to traditional views of Chinese history as they work their way through the parched, yellow earth. One of the world’s great cities once flourished here at Jinsha village in China’s southwest, the 1000 B.C. equivalent of New York or Paris, and then inexplicably vanished, leaving no trace behind in the historical records. Until recently, locals had no idea they were living on top of a great lost bronze-age civilization.