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Dog handler Cecil Meares makes a dog harness at camp in the Ross Dependency of Antarctica, during Captain Robert Falcon Scott's Terra Nova Expedition to the Antarctic, 13th July 1911. (Photo by Herbert Ponting/Scott Polar Research Institute, University of Cambridge/Getty Images)

Dog handler Cecil Meares makes a dog harness at camp in the Ross Dependency of Antarctica, during Captain Robert Falcon Scott's Terra Nova Expedition to the Antarctic, 13th July 1911. (Photo by Herbert Ponting/Scott Polar Research Institute, University of Cambridge/Getty Images)