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Which foods kept Fridtjof Nansen and Hjalmar Johansen alive during their Arctic winter?

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During their winter stay on Frederick Jackson Island from August 1895 to May 1896, Fridtjof Nansen and his companion Hjalmar Johansen survived primarily on polar bear and walrus meat. They also utilized the blubber from these animals as fuel to sustain themselves throughout the harsh Arctic winter.1