Research teams from Lanzhou are unlocking the mysteries of the Yellow River's past and trying to understand how to protect the mighty waterway and its environs in the future, report Li Yingxue in Beijing and Ma Jingna in Gansu province. The Yellow River, known in China as the "mother river", is the artery that pumped life into the earliest vestiges of Chinese civilization. As such, the waterway and its environs hold a special interest to historians and archaeologists, especially those looking to...