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

Steven Kazlowski / Polar bear (Ursus maritimus) on sea ice, off the coast of Svalbard, Norway

David Tipling / Emperor Penguin (Aptenodytes forsteri) walking across the sea ice of Weddell Sea, near Snow Hill Island, Antarctica, November

David Tipling / Kapitan Klebnikov, an ice breaker, growing through ice in the Weddell Sea near Snow Hill Island, Antarctica, November 2006

David Tipling / Emperor Penguins on sea ice with Kaptan Klebnikov ice breaker in background, Snow Hill Island, Antarctica, November

David Tipling / Chinstrap Penguins (Pygoscelis antarcticus) on blue iceberg, Antarctica

Juan Carlos Munoz / Detail of melting ice on Jokulsarlon beach. Southern Iceland, Europe, November 2012.

Juan Carlos Munoz / Broken ice abstract, Jokulsarlon glacier lagoon. Southern Iceland, Iceland, Europe, March 2011.

Juan Carlos Munoz / Detail in frozen waterfall. Selijalandfoss waterfall, Southern Iceland, Europe, March 2011.

Staffan Widstrand / Brunnich's Guillemot (Uria lomvia) stretching wings and calling on small ice floe, Svalbard, Norway, July

Staffan Widstrand / Coastal ice, Svalbard, Norway, July 2011

Staffan Widstrand / Kayaking past icebergs in Svalbard, Norway, July 2011. Model released.

Paul Hobson / Small garden bumble bee (Bombus hortorum) frozen on small twig, covered in ice crystals, Sheffield, UK February 2011

Hiroya Minakuchi / Sea ice, Weddell Sea, Antarctic Peninsula, Antarctica

Enrique Lopez-Tapia / Looking down on the last glaciers near the summit of Mount Kilimanjaro, Tanzania, October 2008

Mark Carwardine / Tourists watching Walrus (Odobenus rosmarus) swimming near boat, Igloolik, Foxe Basin, Nunavut, Arctic Canada, 2007

Mark Carwardine / Tourists in dinghy watching Crabeater seals on iceberg, Antarctica.

Floris van Breugel / Natural iridescent oil film from decaying leaves at the surface of a pool, with a cottonwood leaf floating. Escalante National Monument, Utah. November.

Martha Holmes / Edge of large piece of ice sheet drifting in sea. Antarctic Peninsula. February 2008.

Steven Kazlowski / Polar bear (Ursus maritimus) adult walking over newly formed pack ice during fall freeze up, 1002 area of the Arctic National Wildlife Refuge, North Slope, Alaska, USA

Steven Kazlowski / Polar bear (Ursus maritimus) sow and cub sliding on their backs over the pack ice, much like ice skating, 1002 coastal plain of the Arctic National Wildlife Refuge, Alaska, USA

Steven Kazlowski / Kayaker in front of Bear Glacier, Kenai Fjords National Park, Alaska, USA. No release available.

Steven Kazlowski / Caribou (Rangifer tarandus) pair walking at sunset in the arctic, North Slope of Brooks range, Alaska, USA

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

Mark Taylor / Perito Moreno Glacier, panoramic view, Argentina, January 2010

Erlend Haarberg / Arctic fox (Alopex lagopus) in thick winter fur jumping a river in spring, Hornstrandir, West Fjords, Iceland, April

Andy Sands / Comma butterfly (Polygonia c-album) feeding on flower of Ice plant (Sedum) in garden, Hertfordshire, UK, September

Sandra Bartocha / Light reflected through icicles, Tollensesee, Germany, January

Solvin Zankl / Snowflake magnified under microscope, Lilehammer, Norway

Andy Rouse / Polar bear (Ursus arctos maritimus) mother rolling in snow watched by new year cubs, 6 months old, Svalbard, Arctic

Andy Rouse / Polar bear (Ursus maritimus) standing against expedition ship, taken with extreme wide angle lens, Svalbard, Arctic September 2011

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

Eric Baccega / Young Inuit boy jumping over a crack on ice floe, Ellesmere Island, Nanavut, Canada, June 2012. Model released.

Steven Kazlowski / Young Polar bear (Ursus maritimus) traveling across newly formed pack ice during autumnal freeze up, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska,...

Enrique Lopez-Tapia / Leopard seal (Hydrurga leptonyx) resting on iceberg, Gerlache Strait, Antarctic Peninsula, Antarctica, March 2010. WINNER OF NATURE CATEGORY OF POLLUX COMPEITITON / AWARDS 2013

Konrad Wothe / Close up of iceberg in Inside Passage, Southeast Alaska, USA, July 2006

Konrad Wothe / Iceberg in Endicott Arm, Inside Passage, Southeast Alaska, USA, July 2006

Bertie Gregory / 2020VISION / Moorhen (Gallinula chloropus) running on a frozen lagoon, Brownsea Island, Dorset, England, UK, December

Fergus Gill / 2020VISION / Tree Sparrow (Passer montanus) Perching on a snow covered branch. Perthshire, Scotland.

Bertie Gregory / 2020VISION / Young Red fox (Vulpes vulpes) walking over ice of frozen pond in garden, Bristol, UK, February

Andrew Parkinson / 2020VISION / Moorhen (Gallinula chloropus) adult walking on frozen lake at dusk, backlit, Derbyshire, UK, February

Juan Carlos Munoz / Ice on lake, Plitvice Lakes National Park, Lika, Croatia, Europe, January

Juan Carlos Munoz / Ice on water, Plitvice Lakes National Park, Lika, Croatia, Europe, January

Chadden Hunter / Brinicles (brine icicles or ice stalactites) forming under the ice, growing towards the sea floor, Ross Sea, McMurdo Sound, Antarctica. Taken on location for 'Winter' episode of the BBC Frozen Planet...

Nick Upton / Mallard (Anas platyrhynchos) drake sliding on fresh snow after landing on frozen lake surface, Wiltshire, UK, February

Mike Wilkes / Snipe (Gallinago gallinago) probing for worms, Warwickshire, UK, February

Fergus Gill / 2020VISION / Mute Swan (Cygnus olor) standing on ice at sunrise. Glasgow, Scotland, December.

Orsolya Haarberg / Svi­nafellsjokull glacier in the Vatnajokull ice cap, Skaftafell National Park, Iceland, March 2011

Erlend Haarberg / People walking on Svinafellsjokull glacier in the Vatnajokull ice cap, Skaftafell National Park, Iceland, March 2011

Orsolya Haarberg / Ash plume from the volcano under the Eyjafjallajokull ice cap, coloured red by the rising Sun, Iceland, 7 May 2010

Orsolya Haarberg / Stones frozen in ice, Helgeland, Norway, January

Erlend Haarberg / Rock ptarmigan (Lagopus muta) in snow near glacier, Iceland, August 2010

Erlend Haarberg / Glacier ice on sea shore, Jokulsarlon, Iceland, April 2010

Erlend Haarberg / Subglacial volcanic eruption under the Eyjafjallajokull ice cap with northern lights above the ash plume at night, Iceland, April 2010

Erlend Haarberg / Frost-covered grasses in the pine forest, Klaebu, Norway, January 2010

Erlend Haarberg / Air bubbles frozen in ice, Helgeland, Nordland, Norway, November

Erlend Haarberg / Male Mallard (Anas platyrhynchos) walking on ice, Trondheim, Norway, January

Markus Varesvuo / Black grouse (Lyrurus tetrix) hen perched in frost covered tree, Kuusamo, Finland, February

Andrew Parkinson / 2020VISION / A male (left) and female Ptarmigan (Lagopus mutus) in winter plumage taking flight from an ice field as a skier passes by, Cairngorms National Park, Scotland, UK, March 2011. 2020VISION Exhibition.

Mark Hamblin / 2020VISION / Stac Pollaidh at dawn with Loch Lurgainn in foreground, Coigach, Wester Ross, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Stac Pollaidh at dawn, with frozen Loch Lurgainn in foreground, Coigach, Wester Ross, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / European river otter (Lutra lutra) footprints crossing frozen Loch Lurgainn at dawn, with Sgorr Tuath and Sgorr Deas (Beinn an Eoin) behind, Coigach, Wester Ross, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / European river otter (Lutra lutra) footprints crossing frozen Loch Lurgainn at dawn, with Sgorr Tuath & Sgorr Deas (Beinn an Eoin) behind, Coigach, Wester Ross, Scotland, UK, December 2010

Peter Cairns / 2020VISION / Ice on mudflats, Morecambe Bay, Silverdale, Cumbria, England, UK, February

Roy Mangersnes / Black-legged kittiwakes (Rissa tridactyla) in flight during evening snowfall, Northern Nordaustlandet, Svalbard, Norway, August

Roy Mangersnes / Polar bear (Ursus maritimus) holding piece of ice after licking off freshwater, Spitsbergen, Svalbard, Norway, August

Roy Mangersnes / Mist above Monaco Glacier, North west of Spitsbergen, Svalbard, Norway, August

Roy Mangersnes / Juvenile Black-legged kittiwake (Rissa tridactyla) flying over Raudfjorden, North-western tip of Spitsbergen, Svalbard, Norway, September

Gerrit Vyn / Kangaroo Ridge in the North Cascades, in winter, Okanogan National Forest, Washington, USA, November 2010

Mark Carwardine / Three Gentoo Penguins (Pygoscelis papua) standing at the edge of sea ice. Antarctic Peninsula, January. Book plate from Mark Carwardine's Ultimate Wildlife Experiences.

Mark Carwardine / Chinstrap Penguins (Pygoscelis antarcticus) standing on ice. South Shetland Islands, Antarctica, January. Book plate from Mark Carwardine's Ultimate Wildlife Experiences.

Shattil & Rozinski / Reid Glacier, Glacier Bay National Park, Alaska, USA, May 2011

Graham Eaton / View of frozen Llynnau Mymbyr, a mountain lake, with fog partly revealing a mountain ridge, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / Underwater view of a mountain lake with frozen surface, Llyn Idwal, Snowdonia NP, Gwynedd, Wales, UK, December

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

Brent Stephenson / Calm conditions with sea ice in the Lemaire Channel. 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.

Todd Mintz / Red fox (Vulpes vulpes) sitting in snow, Regina Saskatchewan, Canada

Todd Mintz / Narwhal (Monodon monoceros) pod at surface with one tusk visible, Arctic Bay, Baffin Island, Canada, June

Todd Mintz / Iceberg dive, diver next to ice floe, Pond Inlet, Baffin Island, Nunavut, Canada, June

Tui De Roy / Emperor Penguin (Aptenodytes forsteri), Prydz Bay, eastern Antarctica

Mark Hamblin / 2020VISION / Partially frozen River Spey in winter, Cairngorms NP, Scotland, UK, December 2012

Mark Hamblin / 2020VISION / European river otter (Lutra lutra) footprints in snow on the edge of the frozen River Spey, at sunset, Cairngorms NP, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Partially frozen River Spey in winter, Cairngorms NP, Scotland, UK, December 2012

Chadden Hunter / Entering the ice caves of Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Person standing infront of long icicles, outside volcanic ice cave, Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Aerial view of Timber wolves (Canis lupus) attacking a Bison calf (Bison bison) on the Arctic circle in Northern Canada. Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Aerial view of hunting pack of Timber wolves (Canis lupus) in Arctic circle in Northern Canada, Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / King penguins (Aptenodytes patagonicus) walk along beach, South Georgia. Taken on location for BBC Frozen Planet series, 2008

Chadden Hunter / Emperor penguins (Aptenodytes forsteri) explode out of the water, returning to breed at Cape Washington, Antarctica. Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Frozen Planet team, training on snow mobiles, Svalbard. Taken on location for BBC Frozen Planet series, 2008

Chadden Hunter / Filming on the Antarctic sea-ice at the edge of a small hole. A cameraman gets a shock when a Killer whale (Orcinus orca) mother and calf explode out of the water in front of his face. Taken on locat...

Chadden Hunter / Emperor penguins (Aptenodytes forsteri) males dive through openings in the sea ice to take their first swim in over 4 months as they have spent the bleak winter incubating their eggs. Cape Washington,...

Doug Allan / Killer Whales (Orcinus orca) spy-hopping to observe Weddell Seal (Leptonychotes weddellii) in preparation to knock it from the ice by creating a wave. Marguerite Bay, Antarctic Peninsula, summer. Free...

Doug Allan / Killer Whales (Orcinus orca) create bow wave to knock Weddell Seal (Leptonychotes weddellii) from the ice; a co-operative hunting strategy. Marguerite Bay, Antarctic Peninsula, summer. Freeze Frame bo...