Shepherds Spread Grain Along Silk Road 5,000 Years Ago	Nearly 5000 years ago nomadic shepherds opened some of the first links between eastern and western Asia. Archaeologists recently discovered domesticated crops from opposite sides of the continent mingled together in ancient herders' campsites found in the rugged grasslands and mountains of central Asia.	 €œAncient wheat and broomcorn millet recovered in nomadic campsites in Kazakhstan show that prehistoric herders in Central Eurasia had incorporated both regional crops into their economy and rituals nearly 5000 years ago € said Micheal Frachetti archaeologist at Washington University in St. Louis Mo. and co-author of the study published in the  Proceedings of the Royal Society B.	Photos: The Hunt for Lost Cities    	One of the grains found in Kazahkstan bread wheat (Triticum aestivum) was cultivated in the Middle East by 6000 years ago but didn  t show up in East Asian archaeological sites until 4500 years ago.	Likewise another grain found in the shepherd  s camps domesticated broomcorn millet (Panicum miliaceum) may have originated in what is now China 8000 years ago but didn  t appear in southwestern Asia until 4000 years ago.	Farming Sprang Up In Multiple Places	The nomadic shepherds may have been a crucial link across the vast expanse of steppe desert and mountains that separated the agricultural and economic systems of eastern and western Asia.	Central Asian shepherds did more than transport grains. The archaeologists also found evidence that herders began farming millet wheat barley and legumes by 4000 years ago. The discovery of this prehistoric agricultural activity in Turkmenistan and Kazakhstan pushed back the earliest know farming in the region by 2000 years.	Terracotta Warriors Inspired by Ancient Greek Art	The intrepid ancient shepherds of central Asia blazed trails that would expand into the economic highway of the ancient and medieval world. Eventually the route would carry silks from Han Dynasty China to the Roman Empire and earn the name Silk Road. €	The route remains in use today though now railroads have replaced camels as the preferred means of travel.	This story was provided by  Discovery News.