Archaeologists have unearthed evidence of a prehistoric civilization along the Silk Road in the Gansu province of northwestern China.
According to China's state-run Xinhua news agency, the discovered settlement dates back between 3,600 and 4,100 years ago. Among the findings are ancient coins, tools, crops, and a copper-smelting mill.
"The mill is the earliest of its kind that has been unearthed," Zhang Liangren, a professor at Northwest University in Xi'an, told Xinhua. "It will be of great help for studies of the history of Chinese craftsmanship."
Via David Connolly