A panda struggles on a tree at a panda center in Chengdu, China

A young giant panda struggles to climb down a tree at the Panda Research Base in Chengdu, Sichuan Province, China on November 20, 2017. In China's mountainous Sichuan Province, a network of research centers, nature reserves, breeding facilities and wildlife sanctuaries have been established to support the endangered and vulnerable giant panda. Photo by Stephen Shaver/UPI