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Blue ice occurs when snow falls on a glacier, is compressed, and becomes part of the glacier. During compression, air bubbles are squeezed out so ice crystals enlarge. This enlargement is responsible for the ice's blue color.
King penguins and fur seals on the beach at Salisbury Plain in South Georgia
Ice floating on the lake
Adelie Penguins, in affectionate embrace, near Paulet Island, Antarctica.
Long mountain range surrounded by vast ice sheet rising above sea; even bigger mountains in background
Icebergs Floating in Jokulsarlon Glacier Lagoon, South Iceland
A view of a big group of Gentoo penguins standing on rocks against a cloudy sky in Antarctica
Adelie Penguin, Paulet Island, Antarctic Peninsula, Antarctica. Pygoscelis adeliae. A large nesting site or colony with adults and chicks.
Emperor penguin, Aptenodytes forsteri, colony in front of iceberg, Drescher Inlet Iceport, Weddell Sea, Antarctica
gentoo penguins colony (Pygoscelis papua)  with Antartic landscape Antarctica
Danco Island, Errera Channel, Graham Land, Antarctic Peninsula, Antarctica
The king penguin is the second largest species of penguin, smaller, but somewhat similar in appearance to the emperor penguin.
Crabeater seals on ice floe, Antarctic Peninsula, Antarctica
Dark Antarctica, Iceberg floating on the Antarctic Sound Ocean under dramatic dark overcast cloudscape. Antarctica Mountain Range in the background. Antarctica Ocean - Antarctica Sound, Antarctica.
Colonies of penguins in Antarctica on the adjacent rocks.
Booth Island  is in the northeastern of the Wilhelm Archipelago and was discovered and named by German expedition 1873.
Thick-billed Murre found in Svalbard above the Arctic Circle on ice
gentoo penguins colony (Pygoscelis papua)  with Antartic landscape Antarctica
Ice Mountain
King penguins at St Andrew's Bay on South Georgia
The cute penguins in the snowy Antarctica Continent
A young Gentoo Penguin (Pygoscelis papua) squawks for a parent to feed it on the Sanavirón Peninsula overlooking Paradise Harbour.
Low clouds hovering along the mountain range of the Antarctic Peninsula, Paradise Bay, Gerlach Straight, Antarctic Peninsula, Antarctica.
Aialik Glacier, Kenai Fjords National Park, Alaska
Sea lions on a piece of ice in Antarctic ocean
Leopard seal lying on ice  Hydrurga leptonyx- in Flander Bay Antarctic
Penguin colony Gentoo penguin.Hanah point.
A species of penguin that inhabits a variety of islands and shores in the Southern Pacific and the Antarctic Oceans.
Northwest Fjord in the far reaches of Scoresbysund in eastern Greenland
Large ice formations off the coast of Greenland
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