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December 1909: Men dressed in arctic explorer's furs advertising Sir Ernest Shackleton's lantern lecture about his expeditions to Antarctica and the South Pole. (Photo by Topical Press Agency/Getty Images)

December 1909:  Men dressed in arctic explorer's furs advertising Sir Ernest Shackleton's lantern lecture about his expeditions to Antarctica and the South Pole.  (Photo by Topical Press Agency/Getty Images)