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How did Fridtjof Nansen and Hjalmar Johansen build shelter on Frederick Jackson Island?

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To survive the winter on Frederick Jackson Island, Fridtjof Nansen and his companion, Hjalmar Johansen, constructed a hut using stone. They completed the shelter by covering it with a roof made of walrus hides.1

During their stay from August 26, 1895, to May 19, 1896, they sustained themselves primarily on polar bear and walrus meat, utilizing the animal blubber as fuel for warmth and cooking.1