Polar bear on ice looking at camera, Svalbard and Jan Mayen, Norway, Polar Regions

Waterfall in the ice of Potter glacier, Tierra del Fuego, Chile, South America

Expedition zodiacs, Axel Heiberg island, Nunavut, Canadian Arctic, Canada, North America

A lone adult emperor penguin (Aptenodytes forsteri) on sea ice in the Gullet between Adelaide Island and the Antarctic Peninsula, Antarctica, Polar Regions

Adelie penguins (Pygoscelis adeliae) hauled out onto the ice near Adelaide Island, Antarctica, Polar Regions

Adult gentoo penguins (Pygoscelis papua), returning and coming from the sea at Booth Island, Antarctica, Southern Ocean, Polar Regions

A view in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Adult black-legged kittiwakes (Rissa tridactyla) feeding at the base of a glacier in the Svalbard Archipelago, Norway, Arctic, Europe

Adelie penguin losing down feathers on ice, Antarctica, Polar Regions

Well-behaved dogs tied to snow covered plant pots outside Kenwood House, Hampstead Heath, London, England, United Kingdom

Grey squirrel in snow on Hampstead Heath, North London, United Kingdom

Beech leaves, beech tree, fagus sylvaticia l., covered in hoarfrost, switzerland

Beech leaves, fagus sylvaticia l., covered in hoarfrost, switzerland

An adult humpback whale (Megaptera novaeangliae) head-lunging off Point Adolphus in Icy Strait in Southeast Alaska, USA. Pacific Ocean

An adult humpback whale (Megaptera novaeangliae) breaching off Point Adolphus in Icy Strait in Southeast Alaska, USA. Pacific Ocean

Sunset over the snow-capped mountains of the Fairweather Range across Icy Strait in Southeast Alaska, USA, Pacific Ocean.

A group of adult humpback whales (Megaptera novaeangliae) feeding along the south side of Icy Strait in Southeast Alaska, USA

Polar bear with baby on ice floe, East coast Greenland, Denmark, Europe

Black and white, high alpine mountain landscape, peak Aiguille du Gouter with glacier, Glacier de Taconnaz, behind Mont Blanc, Chamonix, Haute-Savoie, France, Europe

Sheep herd grazing at frosty neolithic Windmill Hill, near Avebury, Wiltshire, England, UK

Polar bear with baby on ice floe, East coast Greenland, Denmark, Europe

Polar bear with baby on ice floe, East coast Greenland, Denmark, Europe

Polar Bear (Ursus maritimus) getting out of water, Svalbard Archipelago, Norway, Europe

Polar Bear (Ursus maritimus) swimming through pack ice, Svalbard Archipelago, Norway, Europe

Tractor parked in front of the Raid caravan. Two technicians hug each other. The Raid supplies the resort 2 or 3 times each summer. A one-way trip represents a distance of 1,200km, an altitude difference of 3,200m, and a driving time of 10 days at a rate of 12 hours per day. Each arrival of the Raid team at Concordia is a moment of joy and celebration. Concordia Antarctic Research Station, Dome C plateau, East Antarctica.

Person who provide contact with the divers inside the maina (sawed entry hole) to dive under the ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Two reindeer in front of a chum, surroundings of Uoyan, Buryatia, Russia

Village/town signs fixed on poles in front of the station/ Making and putting up a sign indicating the direction of one's home is a deeply rooted tradition in the stations. Concordia Antarctic Research Station, Dome C plateau, East Antarctica.

Village of Dambach-la-Ville and frosted vines, Bas-Rhin, Alsace, France

Mongolian horsemen lead a troop of horses running in a meadow covered by snow, Bashang Grassland, Zhangjiakou, Hebei Province, Inner Mongolia, China

A technician at the foot of the station holds a large evacuation sock into which a person is lowered. Once a month, all the staff carry out an emergency evacuation of the station using a ?sock?. The idea is to let yourself slide down a tube of fabric that slows your fall to such an extent that you can even stop yourself by spreading your arms and legs. A technician is waiting for us at the bottom to assist with the last metre of the descent. Concordia Antarctic Research Station, Dome C plateau, East Antarctica.

Village of Barr and frosted vines in mist, Bas-Rhin, Alsace, France

A technician goes into a raised square building on an orange metal structure. An Italian technician specialising in radio and telecommunications goes into the shelter that houses the VSAT antenna, the device that connects the station to the Internet by satellite. This is the station's only link with the outside world. Most of the buildings are elevated to prevent the formation of snowdrifts caused by wind-blown snow. Concordia Antarctic Research Station, Dome C plateau, East Antarctica.

A technician rides an electric bike on the snow, passing a container and crates on the ground. A technician uses an electric fatbike to get to the summer camp area from the station. Immediately after arriving, he removes the electric battery and deposits it in the nearest building where the temperature is positive. If he forgets the battery outside, he will have to push the bike on the way back because the intense cold will have drained the battery. Concordia Antarctic Research Station, Dome C plateau, East Antarctica.

Vernadsky research base, Ukrainian Antarctic station at Marina Point on Galindez Island in the Argentine Islands, Antarctica.

Vernadsky research base, the Ukrainian Antarctic station at Marina Point on Galindez Island in the Argentine Islands, Antarctica.

Vernadsky research base, Ukrainian Antarctic station at Marina Point on Galindez Island in the Argentine Islands, Antarctica.

A Gentoo penguin colony, Pygoscelis papua, near Groussac Argentinian hut, Petermann Island, Antarctica.

Gentoo penguin colony, Pygoscelis papua, at Petermann Island, Antarctica.

Camp with tents on the ice sheet. The brown sediment on the ice is created by the rapid melting of the ice. Landscape of the Greenland ice sheet near Kangerlussuaq. America, North America, Greenland, danish territory

Plancius cruise ship Petermann Island, Antarctica.

Snowfall above La Clusaz. Winter scene in Haute-Savoie, France

Vernadsky research base, the Ukrainian Antarctic station at Marina Point on Galindez Island in the Argentine Islands, Antarctica.

Svalbard Global Seed Vault, Saatgut Tresor. Longyearbyen, die Hauptstadt von Svalbard auf der Insel Spitzbergen im Spitzbergen Archipel. Arktis, Europa, Skandinavien, Norwegen, Spitzbergen

Plancius cruise ship Petermann Island, Antarctica.

Great flamingo (Phoenicopterus roseus) under a light snow shower, Etang de la Grande Maire, Serignan, Herault, France

Castle overlooking Chatillon Bay and autumn mists north of Lake Bourget, Savoie, Alps, France

Great flamingo (Phoenicopterus roseus) under a light snow shower, Etang de la Grande Maire, Serignan, Herault, France

Jukkasjarvi, Sweden.