From The World-Wire:
Wheat grains nearly 5,000 years old found at a Chinese archaeological site two years ago have revealed that western man traveled, brought new agriculture and settled in China much earlier than previously thought, in fact by 2,500 years.
Recently published research  of ANSTO’s* Professor John Dodson and Professor Xiaoqiang Li, State Key Laboratory of Loess and Quaternary Geology, focuses on the Xishanping archaeological site in northwest China where wheat and barley carbon-dated to 2,650BC was found.
Professor Dodson said that wheat and barley are not indigenous to China and originated in the Middle East around 10,000 years ago, so the discovered samples had to have come from the West. [Full Text]