Tianmen Mountain is a mountain located within Tianmen Mountain National Park, Zhangjiajie, in northwestern Hunan Province, China.

Beach Policeman, Potomac River, 1922. (Photo by National Photo Company/Colorized by Patty Allison)

A sheep dressed in a jersey in the colors of the Colombian national soccer team is seen during a exhibition in Nobsa, Colombia June 1, 2014. The sheep is named Falcao, after the Colombian player. REUTERS/Jose Miguel Gomez

A female army recruit attends a base training at the armored battalion in Setermoen, northern Norway on August 11, 2016. Norway has become the first NATO member to have compulsory conscription for women as well as men in the army. Recently, the first batch of army recruits joined the ranks in The Armored Battalion in the Norwegian Army located in Setermoen in northern Norway. (Photo by Kyrre Lien/AFP Photo)

FaceResearch.org, a site run by two psychologists at the University of Aberdeen in Scotland, features software that can average together faces from thousands of photos. These images purportedly show the average face of women from 40 different nationalities.

A large bull walrus returns to the shores of Prins Karl Forland after diving and feeding on clams. (Photo by Paul Nicklen/National Geographic). Svalbard, Norway, 2011

Ten-year-old panda Xin Yue channels Kate Winslet in Titantic at Taihu Lake National Wetland Park in the Jiangsu Province of China.