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Walruses use sea ice as platforms on which to nurse their young and launch their dives.
Photo

Walrus Rests on Ice

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A small Adélie penguin hops on a piece of ice.
Photo

Adélie Penguin Jumping Out of the Water

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A narwhal breaches the surface, its tusk pointed to the sky
Article

Why a Tusk? The real-life unicorns of the sea and the tusks that make them famous

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Looking through this iceberg's reflection in the Antarctic water, you can see the iceberg below the surface—some 90% of its total volume.
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The Arctic and The Antarctic

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A team of scientists explore the Arctic ocean.
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Under Arctic Ice

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On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
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Sea Level Rise

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