6.4 mln-yr-old Mesopithecus fossils discovered in China's Yunnan

File photo taken on Aug. 19, 2011 shows a black snub-nosed monkey, also known as the Yunnan golden monkey. Scientists from China, the United States, Greece and Australia have confirmed the discovery of a collection of Mesopithecus fossils dating back about 6.4 million years in southwest China's Yunnan Province. (Photo by Long Yongcheng/Xinhua)

Editor: John Li