Staffan Widstrand / Man on skidoo racing across ice, Baffin Island, Canadian Arctic, Northwest Territories
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Chadden Hunter / Getting snow off snowmobiles after successful filming of Timber wolves hunting bison, Arctic circle in northern Canada. Taken on location for BBC Frozen Planet series, 2009
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Chadden Hunter / Travelling across Northern Canada on skidoos, Arctic circle, Taken on location for BBC Frozen Planet series, 2009
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Jeff Vanuga / Snow machines and tourists at Mud Volcano with Dragon's Mouth in the background. Yellowstone National Park, Wyoming, January 2011.
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Eric Baccega / Inuit hunter driving snowmobile with a qamutik (Inuit sledge) on icepack. Arctic Bay, Baffin Island, Nunavut, Canada, June 2011.
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Eric Baccega / Inuit hunter driving snowmobile with Qamutik (Inuit sledge) on icepack. Arctic Bay, Baffin Island, Nunavut, Canada, June 2011.
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Doug Allan / Inuit camp on spring sea ice, Admiralty Inlet, Baffin Island, Canadian Arctic, NW Territories
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Doug Allan / Polar bear film crew on skidoos pass by Ship Point, Admiralty Inlet, Canadian Arctic
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Steve Packham / Skidoos lined up in Longyearbyen, Svalbard, Norway, Europe
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Sue Flood / Martha Holmes, Doug Allan and Inuit guides on skidoos Canada