Frederique Olivier / Weddell seal (Leptonychotes weddellii) pup on ice beside mother, Antarctica, Taken on location for the BBC series, Frozen Planet.

Steven Kazlowski / The mountainous coastal landscape of the western Antarctic peninsula

Steven Kazlowski / Crabeater seal (Lobodon carcinophagus) resting on ice along the western Antarctic Peninsula, Southern Ocean

Frederique Olivier / Weddell seal (Leptonychotes weddellii) pup on ice beside mother, Antarctica, Taken on location for the BBC series, Frozen Planet.

Bryan and Cherry Alexander / Sand swamped barrel staves from the days of whale hunting, Whalers Bay, Deception Island, Antarctica.

Bryan and Cherry Alexander / Tourists on steaming beach by abandoned whaling station at Whalers Bay. Deception Island, South Shetland Islands, Antarctica. 2009

Bryan and Cherry Alexander / Tourists standing on steaming volcanic beach at Whalers Bay, with the abandoned whaling station beyond. Deception Island, South Shetland Islands, Antarctica, 2009.

Bryan and Cherry Alexander / Tourists on the shore under a glacier on the Whittle Peninsula, Antarctic Peninsula, 2009.

Bryan and Cherry Alexander / Tourists on the shore under a glacier on the Whittle Peninsula, with Weddell seal (Leptonychotes weddellii) in foreground, Antarctica, 2009.

Bryan and Cherry Alexander / Mountains, valleys and glacier along the Fallieres Coast. Marguerite Bay, Graham Land, Antarctic Peninsula, February 2009.

Bryan and Cherry Alexander / Mountains at dusk on the Antarctic Peninsula, February 2009.

Bryan and Cherry Alexander / Mountains at dusk on the Antarctic Peninsula, February 2009.

Bryan and Cherry Alexander / Ukrainian Antarctic Research Station Vernadsky, (formerly Faraday) with glaciers beyond. Graham Land, Antarctica, February 2009.

Bryan and Cherry Alexander / Spanish Antarctic Research vessel A33 "Hesperides" passing a glacier in Marguerite Bay, Antarctica, February 2009.

Bryan and Cherry Alexander / Tourists and Gentoo penguins (Pygoscelis papua) standing on steaming volcanic beach at Whalers Bay, with the abandoned whaling station beyond. Deception Island, South Shetland Islands, Antarctica, 200...

Bryan and Cherry Alexander / Mountain peak draped with cornices and ice artifacts, Antarctica, October 2006.

Bryan and Cherry Alexander / Reflections of mountains and glaciers, Lemaire Channel, Southern Ocean, Antarctica, October 2006.

Bryan and Cherry Alexander / Tourists on the flying bridge as they pass through the Lemaire Channel, Southern Ocean, Antarctica, October 2006.

Bryan and Cherry Alexander / Dramatic cornices top a mountain peak covered with ice and glaciers. Gerlache Strait, Antarctica, October 2006.

Bryan and Cherry Alexander / Dramatic cornices top a mountain peak covered with ice and glaciers. Gerlache Strait, Antarctica, October 2006.

Bryan and Cherry Alexander / Cap of glacial ice adorning a mountain summit. Antarctic Peninsula, Antarctica, October 2006.

Bryan and Cherry Alexander / Mountains, bands of cloud and high wind in the Gerlache Strait, Southern Ocean, Antarctica, October 2009.

Bryan and Cherry Alexander / Cloud topped mountain and katabatic winds in the lower glaciers. The Gerlache Strait, Southern Ocean, Antarctica, October 2006.

Bryan and Cherry Alexander / Mountains and bands of cloud and high wind in the Gerlache Strait, Southern Ocean, Antarctica, October 2006.

Bryan and Cherry Alexander / Katabatic wind blowing snow off the top of a glacier in Antarctic Sound, Southern Ocean, Antarctica, October 2006.

Bryan and Cherry Alexander / Branscombe Glacier with Mount Shinn and the Branscombe Ridge on the horizon. Vinson Massif. Antarctica, January 2006.

Bryan and Cherry Alexander / Crevasse leading deep into glacier revealing ice bridges and cold blue shadows. Cierva Cove, Antarctica, February 2009.

Frederique Olivier / Coastal landscape, Macquarie Island, Southern Atlantic, Australian Antarctica, June 2010

Tim Laman / Face of a glacier discoloured by volcanic ash. Antarctica, January 2009

David Tipling / Dead Emperor penguin (Aptenodytes forsteri) chick, Dawson-Lambton Glacier, Weddell sea, Antarctica

Steven Kazlowski / Sunset over the frozen landscape of the western Antarctic peninsula

Steven Kazlowski / Sunset over the frozen landscape of the western Antarctic peninsula

Steven Kazlowski / Glaciers and mountains of the western Antarctic peninsula, Southern Ocean

Steven Kazlowski / Glaciers and mountains of the western Antarctic peninsula, Southern Ocean

Steven Kazlowski / Giant petrel (Macronectes giganteus) parent and chick on their nest, western Antarctic Peninsula, Southern Ocean

Steven Kazlowski / Giant petrel (Macronectes giganteus) parent and chick on their nest, western Antarctic Peninsula, Southern Ocean

Steven Kazlowski / Sunset over the frozen landscape of the western Antarctic peninsula

Steven Kazlowski / Glaciers and mountains of the western Antarctic peninsula, Southern Ocean

David Tipling / Antarctic snowy landcape with Emperor penguin colony Weddell sea Dawson-Lambton glacier

David Tipling / Tented camp on ice with aeroplanes, near to Emperor Penguin (Aptenodytes forsteri) colony, Dawson-Lambton Glacier, Weddell Sea, Antarctica. November

David Tipling / Ellsworth Mountains, Antarctica

Roberto Rinaldi / The natural harbour of Port Lockroy, Antarctic Peninsula