Prehistoric food globalization spanned three millennia
(PHYSorg.com Archaeology & Fossils)

Since the beginning of archaeology, researchers have combed the globe searching for evidence of the first domesticated crops. Painstakingly extracting charred bits of barley, wheat, millet and rice from the remains of ancient hearths and campfires, they`ve published studies contending that a particular region or country was among the first to bring some ancient grain into cultivation.