Adult leopard seal (Hydrurga leptonyx), hauled out on ice floe at Dorian Bay near the Antarctic Peninsula, Southern Ocean, Polar Regions

Adelie penguin (Pygoscelis adeliae) in snowstorm at Brown Bluff on the Antarctic Peninsula in the Weddell Sea, Antarctica, Polar Regions

Harp seal (Pagophilus groenlandicus), hauled out on the pack-ice in between Iceland and Greenland in the Denmark Strait, Denmark

Adult black-legged kittiwakes (Rissa tridactyla) on ice near Alexander Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia

Adult snow petrel (Pagodroma nivea nivea) near the Antarctic Peninsula, Antarctica, Southern Ocean, Polar Regions

Chinstrap penguins (Pygoscelis antarctica) ashore at Useful Island, Antarctica, Polar Regions

Adult black-legged kittiwakes (Rissa tridactyla) on ice in the Svalbard Archipelago, Barents Sea, Norway

Young male polar bear (Ursus maritimus), feeding on a fin whale carcass in Holmabukta in the Svalbard Archipelago, Norway

An adult polar bear (Ursus maritimus) leaping from ice floe to ice floe in the Svalbard Archipelago, Norway, Arctic, Europe

Gentoo penguins (Pygoscelis papua) hauled out in Port Foster, inside the caldera at Deception Island, Antarctica, Polar Regions

Adult bearded seal (Erignathus barbatus) hauled out on the ice in the Svalbard Archipelago, Norway

Mother polar bear (Ursus maritimus), with cub of the year in Holmabukta in the Svalbard Archipelago, Norway

A curious young polar bear (Ursus maritimus), swimming to the smell of a fresh bearded seal kill in SpitsBergen, Vestland, Norway

Antarctic tern (Sterna vittata), on the wreck of the Guvernoren in the Enterprise Islands, Antarctica, Southern Ocean, Polar Regions

Polar bear laying on ice, Svalbard and Jan Mayen, Norway, Polar Regions

View of glacial ice on Alexander Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia

King penguins (Aptenodytes patagonicus) on the beach at breeding and nesting colony at Salisbury Plain in the Bay of Isles, South Georgia, Southern Ocean, Polar Regions