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CHENGDU, CHINA - September 12: A giant panda scratches in the Panda Breeding and Research Center on September 12, 2010 in Chengdu, China. (Photo by Lucas Schifres/Getty Images)

CHENGDU, CHINA - September 12: A giant panda scratches in the Panda Breeding and Research Center on September 12, 2010 in Chengdu, China. (Photo by Lucas Schifres/Getty Images)