Chadden Hunter / Frozen Planet team, training on snow mobiles, Svalbard. Taken on location for BBC Frozen Planet series, 2008
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Bryan and Cherry Alexander / Inuit congregation leaving the Anglican church after sunday service in Igloolik. Nunavut, Canada, 1995.
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Bryan and Cherry Alexander / Inuit hunter driving his snowmobile across the tundra during hunting trip. George River, North Quebec, Nunavik, Canada, 1998.
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Bryan and Cherry Alexander / Inuit hunter driving his snowmobile across tidal ice during hunting trip. George River, North Quebec, Nunavik, Canada, 1998.
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Bryan and Cherry Alexander / Evenk woman standing by traditional reindeer herders' winter tent (Tordok). Kusur, North Yakutia, Siberia, Russia, 2001.
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Bryan and Cherry Alexander / Snow-mobiles pulling sleds with family boxes on the sea ice. Bylot Island, Nunavut, Canada, 1999.
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Dan Burton / Aerial view of Saami herdsmen herding Reindeer (Rangifer tarandus) Lapland, Sweden, November 2009. Photograph taken from a motorised paraglider.