Bryan and Cherry Alexander / Inuit hunter travelling by dog sled during the polar night. Northwest Greenland, 1987. 40 BELOW bookplate.

Bryan and Cherry Alexander / Grounded iceberg, with grooves caused by air bubbles eroding ice. Greenland, 1985.

Bryan and Cherry Alexander / Moonlit iceberg taken at midday during the polar night, Northwest Greenland, 1980. 40 BELOW bookplate.

Bryan and Cherry Alexander / Inuk man from Igloolik sitting inside an Igloo. Nunavut, Canada, 1990. Editorial use only.

Bryan and Cherry Alexander / Polar bear (Ursus maritimus) mother and cubs with Parhelion / sun dogs over sea ice. Churchill, Manitoba, Canada.

Bryan and Cherry Alexander / Meltwater pouring off iceberg above hole. Scoresbysund Fiord, East Greenland, September 2005.

Bryan and Cherry Alexander / Dog sleds pulled by Huskies (Canis familiaris)crossing sea ice, Northwest Greenland, 1980

Bryan and Cherry Alexander / Inuit hunter in kayak in the ice strewn waters of Inglefield Bredning, Northwest Greenland, 1980. 40 BELOW bookplate.

Bryan and Cherry Alexander / Houses in the Inuit community of Qaanaaq, on the shore of Inglefield Bay in Autumn. Northwest Greenland, September 2008.

Bryan and Cherry Alexander / Crystal heart of an iceberg, Greenland, 1980. 40 BELOW bookplate.

Bryan and Cherry Alexander / Inuit hunter scanning ice of Melville Bay for Polar bears. Northwest Greenland, 1986. 40 BELOW bookplate.

Bryan and Cherry Alexander / Inuit hunters climbing an iceberg to scan sea-ice for game. Melville Bay, Northwest Greenland, 1980. 40 BELOW bookplate.

Bryan and Cherry Alexander / Sami tent / lavvu made from birch poles and blankets with a fire burning inside. North Norway, 1985.

Bryan and Cherry Alexander / Inuit children dressed in reindeer skin clothing. Baffin Island, Nunavut, Canada, 1987. Editorial use only.

Bryan and Cherry Alexander / Iceberg in a calm sea, Scoresbysund Fjord, East Greenland, September 2005.

Bryan and Cherry Alexander / View of Anderson River as it runs through tundra east of Inuvik. North West Territories, Canada, 1996.

Bryan and Cherry Alexander / Boiling water exploding into vapour and ice when thrown into cold air at -51 degrees celsius. This is because boiling water is close to a gas and breaks into tiny droplets that freeze simultaneously....

Bryan and Cherry Alexander / Low winter sunshine shining through forest near Lovozero. Murmansk, Northwest Russia, 2005.

Bryan and Cherry Alexander / Viluchinsky Volcano viewed across Autumn colour. Kamchatka, Siberia, Russia, 1999.

Bryan and Cherry Alexander / Nenets men checking fishing net set under ice on lake in the Gydan Peninsula. Western Siberia, Russia, 2000. 40 BELOW bookplate.

Bryan and Cherry Alexander / Inuit hunter dragging a dead seal while out hunting at the floe edge. Igloolik, Nunavut, Canada, 1990. Editorial use only.

Bryan and Cherry Alexander / Nenya Vanuito, a young Nenets girl, wearing a traditional hat with fur trim at a winter camp near Tambey. Yamal Peninsula, Western Siberia, Russia. March 2011

Bryan and Cherry Alexander / Storm blowing snow around sleds and houses in Inuit village of Siorapaluk. Thule, Northwest Greenland, 1977.

Bryan and Cherry Alexander / Inuit hunter and his wife travelling by dog sled on a seal hunting trip across sea ice near Igloolik. Nunavut, Canada, April 2008.

Bryan and Cherry Alexander / Inuit hunter lancing harpooned Narwhal (Monodon monoceros) to kill it. Northwest Greenland, 1980.

Bryan and Cherry Alexander / Inuit man dressed in Reindeer / Caribou skin clothing while hunting at the floe edge. Igloolik, Nunavut, Canada, 1990. 40 BELOW bookplate.

Bryan and Cherry Alexander / Angular slabs of a tabular iceberg in Hall Bredning. East Greenland, September 2005.

Bryan and Cherry Alexander / Melting ice floe floating in front of iceberg off the coast of Ellesmere Island, Nunavut, Canada.

Bryan and Cherry Alexander / Patterns on newly formed sea ice at floe edge in winter. Northwest Greenland, 1980.

Bryan and Cherry Alexander / Dramatic 'Undulatus asperatus' cloud formation as a storm builds at dawn over Qaanaaq, Inglefield Bay. Northwest Greenland, September 2008. This cloud formation was first proposed as a new type of clo...

Bryan and Cherry Alexander / Mountain scenery along coast of the Chukotskiy Peninsula. Bering Strait, Chukotka, Siberia, Russia, 2004.

Bryan and Cherry Alexander / Sundog / Parhelion, circle of light around the sun, formed by ice crystals in the atmosphere, above icebergs, Northwest Greenland, 1998.

Bryan and Cherry Alexander / Komy girl, aged 2, playing in the snow at her family's winter camp. Yamal, Northwest Siberia, Russia, February 2007. Editorial use only.

Bryan and Cherry Alexander / Inuit hunter doing handstand on sea ice to celebrate successful hunt. Northwest Greenland, 1980. 40 BELOW bookplate.

Bryan and Cherry Alexander / Reindeer / Caribou (Rangifer tarandus) at their winter pastures in the Verkhoyansk Mountain Range. Yakutia, Siberia, Russia, 1999

Bryan and Cherry Alexander / Khanty women in traditional dress at a Spring festival in the village of Pitlyar. Yamal, Western Siberia, Russia, 2006. 40 BELOW bookplate.

Bryan and Cherry Alexander / Girl frosted up at -52 degrees celsius in winter. Verkhoyansk, Yakutia, Siberia, Russia, 1999.

Bryan and Cherry Alexander / Elderly Nenets man holding sacred drum, which he made in 1946. Yamal, Western Siberia, Russia, 2001.

Bryan and Cherry Alexander / Woman walking along street in the town of Yakutsk during winter. Yakutia, Siberia, Russia, 2001.

Bryan and Cherry Alexander / Brightly coloured wooden homes by the shopping centre, with view to Gamle Longyearbyen. Svalbard, Norway, 2004.

Bryan and Cherry Alexander / Inuit hunter jumping from one ice floe to another. Ellesmere Island, Nunavut, Canada, 1994.

Bryan and Cherry Alexander / Ice floes as sea ice breaks up in summer off coast of Northwest Greenland, 1980.

Bryan and Cherry Alexander / Towering iceberg in the Ilulissat Icefjord, West Greenland, 2008.

Bryan and Cherry Alexander / Large Inukshuk built at Igloolik in 2000 to commemorate the new millenium. Nunavut, Canada, 2002.

Bryan and Cherry Alexander / Iceberg surrounded by melting sea ice in summer, Northwest Greenland, 1997.

Bryan and Cherry Alexander / Nenets girl with pet Swan cygnet, probably Whistling swan (Cynus columbianus). Nadym Tundra, Yamal, Western Siberia, Russia, 2000. 40 BELOW bookplate.

Bryan and Cherry Alexander / Young Inuit girl from Siorapluk holding Husky dog (Canis familiaris) puppy, Northwest Greenland, 1989.

Bryan and Cherry Alexander / Nenets woman cooking fish inside her tent at summer fishing camp. Yamal, Western Siberia, Russia, 2000. 40 BELOW bookplate.