Bryan and Cherry Alexander / Inuit hunters trying to stop lead opening using their harpoons. Northwest Greenland, 1977.
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Steven Kazlowski / An Inupiaq whaling crew prepare to paddle their seal skin boat / umiak, in an open lead in the Chukchi Sea, during spring whaling season, off the Arctic coastal village of Point Hope, Alaska, May 2008
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Steven Kazlowski / Cape Thompson and an open lead in the pack ice, blown open by strong winds, indicating thinning sea ice conditions, 26 miles south of Point Hope, Arctic coast of Alaska, March 2008
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Flip Nicklin / Narwhal (Monodon monoceros) group in ice break, Baffin Island, Nunavut, Canada
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Ashley Cooper / Mountaineer winter climbing in Coire an Sneachda, Cairngorm mountains, Scotland, UK. February 2011
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Ashley Cooper / Mountaineer winter climbing in Coire an Sneachda, Cairngorm mountains, Scotland, UK. February 2011
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Ashley Cooper / Rotten sea ice off the north coast of Svalbard, Norway. July 2013
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Ashley Cooper / Rotten sea ice off the north coast of Svalbard, Norway July 2013
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Ashley Cooper / The Russian research vessel, AkademiK Sergey Vavilov an ice strengthened ship on an expedition cruise to Northern Svalbard, Norway, July 2013
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Ashley Cooper / The Russian research vessel, AkademiK Sergey Vavilov an ice strengthened ship on an expedition cruise to Northern Svalbard, Norway, July 2013
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Ashley Cooper / Rotten sea ice off the north coast of Svalbard, Norway July 2013
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Ashley Cooper / The Russian research vessel, AkademiK Sergey Vavilov an ice strengthened ship on an expedition cruise to Northern Svalbard, Norway, July 2013