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A walrus sits on a floating piece of ice.
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Walrus on Ice

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

Tusks of Mystery

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A humpback whale breaching in Antarctic waters.
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Humpback Whale in Antarctic Waters

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Aerial view of two bowhead whales swimming in the ocean.
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Bowhead Whale: One Species at a Time

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Polar bears are threatened by a lack of sea ice.
Article

Climate Change at the Poles

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The Ross Sea is a 1.9 million square mile (3.6 million square km) stretch of ocean off the coast of Antarctica.
Slideshow

A Trip South to Antarctica’s Ross Sea

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A narwhal breaches the surface, its tusk pointed to the sky
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Why a Tusk? The real-life unicorns of the sea and the tusks that make them famous

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In 2011, storms and lack of ice-cover due to a warmer winter climate resulted in hundreds of seal pups being washed up on the shore of Prince Edward Island. Like many, this young seal faced an uncertain future. See more Nature's Best Photos.
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Ice-Loving Seals and the Loss of Sea Ice

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