Danny Green / Ringed seal (Pusa hispida) and pup resting on ice. Svalbard, Norway. April.

Danny Green / Ringed seal (Pusa hispida) resting on ice, reflected in water. Svalbard, Norway. July.

Sven Zacek / Bearded seal (Erignathus barbatus) sunbathing on iceberg broken off from glacier. Kongsfjorden fjord, Spitsbergen, Norway. June 2014.

Roy Mangersnes / Juvenile female Polar bear (Ursus maritimus) rolling, playing with ice in a fjord, Svalbard, Norway, March.

Sven Zacek / View through glacier ice towards snow-covered mountains in Kongsfjorden fjord in Svalbard, Norway. June 2015.

Peter Cairns / Reflections in glacial fjord, Kongsfjorden, Svalbard, Norway

Steven Kazlowski / Female Polar bear (Ursus maritimus) curiously checks out the photographer, standing upright on hind legs, Svalbard, Norway

Wild Wonders of Europe / de la Lez / Smeerenburg glacier, Smeerenburg fjord, Svalbard, Norway, July 2008

Wild Wonders of Europe / de la Lez / Smeerenburg glacier, Smeerenburg fjord, Svalbard, Norway, July 2008

Wild Wonders of Europe / de la Lez / Ice in front of the Smeerenburg glacier, Smeerenburg fjord, Svalbard, Norway, July 2008

Roy Mangersnes / Sunrise over the frozen Temple Fjord, West coast of Spitsbergen, Svalbard, Norway, March 2009

Tui De Roy / Glacier with tourist expedition in inflatable zodiac, southern Greenland Fjords, Greenland