Kristel Richard / A traditionally dressed Nihang (an armed Sikh soldier) galloping with two Nukra horses during the Maghi Mela festival, Mukstar, Punjab, India, January 2010

Andy Rouse / Polar Bear (Ursus maritimus) portrait in sea-ice landscape. Wide angle / fish-eye shot. Svalbard, Norway, September.

Andy Rouse / Polar bear (Ursus maritimus) on pack ice taken with fisheye lens, Svalbard, Arctic September 2011

Steven Kazlowski / Young Polar bear (Ursus maritimus) in the water along the coast of the Beaufort Sea, Bernard Spit, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Brent Stephenson / A large hole in an iceberg with icicles hanging. Yalour Islands, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Huge iceberg with streaked sky under expansive open sky. Drake Passage, near the South Shetland Islands, Antarctica, December.

Brent Stephenson / Large growler berg in the Lemaire Channel. Antarctic Peninsula, Antarctica, January.

Andy Rouse / Waterfall and ice cliff catching evening light. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Andy Rouse / Waterfall from ice cliffs with ice-cap stretching into the distance. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Andy Rouse / Ice cliff and waterfall catching evening light. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Andy Rouse / Waterfall from ice cliffs with ice-cap stretching into the distance. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Andy Rouse / Polar Bear (Ursus maritimus) crossing pack ice. Svalbard, Norway, September.

Andy Rouse / Polar Bear (Ursus maritimus) sleeping on pack ice. Wide angle / fish-eye shot. Svalbard, Norway, September.

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) sitting on floe in vast thawing sea-ice landscape. Spitsbergen, Svalbard, August 2011. Second place, Mammals Category, GDT 2012 competion. Winner in ANIMALS IN THEIR ENVIR...

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) in arctic ice landscape backlit by midnight sun. Nordaustlandet, Svalbard, August.

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) looking across ice floe seascape. Nordaustlandet, Svalbard, August.

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) profile in silhouette. Nordaustlandet, Svalbard, August.

Jenny E. Ross / Polar Bear (Ursus maritimus) sub-adult male on cliff searching for eggs in Brunnich's Guillemot nests, as gulls look on from above. This unusual behaviour happens when when lack of sea-ice prevents t...

Bryan and Cherry Alexander / Huge blocks of ice teeter, ready to become icebergs on the glaciated coast. Gerlache Strait, Southern Ocean, Antarctica, October 2009.

Bryan and Cherry Alexander / Icicles hanging from a ledge on an iceberg, Antarctica, October 2006.

Matthias Breiter / Polar Bear (Ursus maritimus) cooling off on a frozen lake, Churchill, Manitoba, Canada

Andy Rouse / Polar bear (Ursus maritimus) on broken up pack ice, Svalbard, Norway, September 2009

Tom Gilks / Person dressed as a Polar bear holding a sign asking 'Has anybody seen my habitat?' Part of 'The Wave' climate change march ahead of the Copenhagen climate summit, near Big Ben, London, UK, 5th Decemb...

Konrad Wothe / Chinstrap Penguin (Pygoscelis antarctica) hopping over ice, South Sandwich Islands, Antarctica

Stephen Belcher / Adelie Penguin (Pygoscelis adeliae) jumping from iceberg, Antarctic Peninsula, Antarctica

Colin Monteath / Ice boulders on Ridley Beach, Cape Adare, Ross Sea, Antarctica

Kevin Schafer / Adelie Penguin (Pygoscelis adeliae) pair, Antarctica

Jasper Doest / Arctic Fox (Alopex lagopus) in light snow fall, Svalbard, Norway

Jan Vermeer / Ice shelf, Antarctica

Jan Vermeer / Adelie Penguin (Pygoscelis adeliae), Antarctica

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) chick pair, Snow Hill Island, Antarctica

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) chicks, Snow Hill Island, Antarctica

Jan Vermeer / Gentoo Penguin (Pygoscelis papua) mother feeding chick, Antarctica

Jan Vermeer / Adelie Penguin (Pygoscelis adeliae) trio on ice, Antarctica

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) family, Weddell Sea, Antarctica

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) chicks, Antarctica

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) parent with chick, Antarctica

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) chicks, Riiser-Larsen Ice Shelf, Antarctica

Jan Vermeer / Chinstrap Penguin (Pygoscelis antarctica) pair courting, Southern Thule, South Sandwich Islands, Antarctica

Jasper Doest / Arctic Fox (Alopex lagopus) kits playing, Svalbard, Norway

Mitsuaki Iwago / Polar Bear (Ursus maritimus) sitting in field of fireweed, Arctic

Steven Kazlowski / Polar bear (Ursus maritimus) sow and cub walking on multi-layer ice (freshwater pans formed over the years where the salt is squeezed out of the ice) on the Chukchi Sea, off the National Petroleum Res...

Steven Kazlowski / Polar bear (Ursus maritimus) sow and cub walking on multi-layer ice (freshwater pans formed over the years where the salt is squeezed out of the ice) on the Chukchi Sea, off the National Petroleum Res...

Steven Kazlowski / Polar bear (Ursus maritimus) sow with cub walking on multi-layer ice (freshwater pans formed over the years where the salt is squeezed out of the ice) on the Chukchi Sea, off the National Petroleum Re...

Steven Kazlowski / Polar bear (Ursus maritimus) sow with cub swimming towards ice on the Chukchi Sea, off the National Petroleum Reserves, Alaska

Norbert Wu / Gentoo Penguin (Pygoscelis papua) pair, Cuverville Island, Antarctica Peninsula, Antarctica

Tui De Roy / Rockhopper Penguin (Eudyptes chrysocome) portrait, Gough Island, South Atlantic

Konrad Wothe / Emperor Penguin (Aptenodytes forsteri) family, Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) standing on iceberg agitated, western Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) chick begging parent for food, western Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) flapping wings, Holtedahl Bay, Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) spreading and flapping wings, Armstrong Reef, western Antarctica

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) parent huddling with two chicks, Booth Island, Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) pair, Armstrong Reef, western Antarctica

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) on small ice floe, Gerlache Passage, Antarctica

Yva Momatiuk & John Eastcott / Black-browed Albatross (Thalassarche melanophrys) chick, New Island, Falkland Islands

Yva Momatiuk & John Eastcott / Black-browed Albatross (Thalassarche melanophrys) chick, New Island, Falkland Islands

Theo Allofs / Large icebergs at midnight, end of June, mid-summer night, Greenland

Niall Benvie / A conceptual picture of Global warming illustrated through a model of the earth with a sign at the North Pole saying "Danger, Thin Ice".

Michio Hoshino / Harp Seal (Phoca groenlandicus) pup lying in the snow

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) standing on iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) on edge of iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) group diving off iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) group jumping off iceberg into icy water, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) trio diving off iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) on iceberg, Paulet Island, Antarctica

Ingo Arndt / Emperor Penguin (Aptenodytes forsteri) four walking in a line, Weddell Sea, Antarctica

Ingo Arndt / Antarctic Krill (Euphausia superba) with yellow algae in stomach, a small shrimp-like crustacean is the most important zooplankton in the Antarctic food web, Weddell Sea, Antarctica

Ingo Arndt / Ctenophore (Beroe cucumis) showing typical symmetrical combs made of cilia, Weddell Sea, Antarctica

Ingo Arndt / Leopard Seal (Hydrurga leptonyx) barking, Weddell Sea, Antarctica

Ingo Arndt / Hydromedusae (Calycopsis borchgrewinki) with extended tentacles, Weddell Sea, Antarctica

Ingo Arndt / Emperor Penguin (Aptenodytes forsteri) pair courting, Weddell Sea, Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group riding sculpted iceberg, Terre Adelie Land, east Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group riding sculpted iceberg, Terre Adelie Land, east Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group riding sculpted iceberg, Terre Adelie Land, east Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group riding sculpted iceberg, Terre Adelie Land, east Antarctica

Colin Monteath / Heavy pack ice, Terre Adelie Land, east Antarctica

Mitsuaki Iwago / King Penguin (Aptenodytes patagonicus) at edge of ice shelf, Antarctica

Jim Brandenburg / Arctic Wolf (Canis lupus) pack hunting Muskox (Ovibos moschatus) herd, Ellesmere Island, Nunavut, Canada

Flip de Nooyer / Gentoo Penguin (Pygoscelis papua) two downy chicks standing together in nesting colony, Antarctica

Flip de Nooyer / Black-browed Albatross (Thalassarche melanophrys) chicks on tower nests, South Georgia Island

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

Jim Brandenburg / Polar Bear (Ursus maritimus) walking across ice floes, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / Arctic Wolf (Canis lupus) juvenile male babysitting pups, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / Arctic Wolf (Canis lupus) alpha male known as Buster, smelling Arctic Poppy (Papaver lapponicum) flowers, Ellesmere Island, Nunavut, Canada

Flip Nicklin / Polar Bear (Ursus maritimus) hauling out on ice floe, Wager Bay, Canada

Thomas Mangelsen / Polar Bear (Ursus maritimus) walking on ice at sunset, Churchill, Manitoba, Canada

Patricio Robles Gil / Atlantic Walrus (Odobenus rosmarus rosmarus) resting on ice, Spitsbergen, Svalbard, Norway

Konrad Wothe / Emperor Penguin (Aptenodytes forsteri) parent with two chicks, Antarctica

Thomas Mangelsen / Polar Bear (Ursus maritimus) male on broken ice, Wapusk National Park, Manitoba, Canada

Thomas Mangelsen / Polar Bear (Ursus maritimus) and Arctic Fox (Alopex lagopus) on ice field, Hudson Bay, Churchill, Manitoba, Canada

Pete Oxford / Emperor Penguin (Aptenodytes forsteri) pair, Flutter EP Rookery, Cape Darnley, Australian Antarctic Territory, Antarctica

Gordon Court / Adelie Penguin (Pygoscelis adeliae) gives a warning call when under threat, Cape Bird, Ross Island, Antarctica

Eric Dietrich / Chinstrap Penguin (Pygoscelis antarctica) group riding iceberg, Weddell Sea, Antarctica

Colin Monteath / Humpback Whale (Megaptera novaeangliae) tail near iceberg, Antarctica

Colin Monteath / Humpback Whale (Megaptera novaeangliae) observed by tourists in a zodiac boat near Melchoir Island, Antarctic Peninsula, Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group on iceberg, Paulet Island, Antarctica