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

Climate Change at the Poles

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A walrus sits on top of ice.
Article

The Cultural Icescapes of the Arctic

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The Greenland glacier Jakobshavn Isbrae is massive, at around 40 miles long and more than a mile thick.
Article

Up Close and Personal With the Fastest Glacier in the World

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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 pair of sea butterflies float in the Arctic ocean.
Article

Searching for the Ocean Acidification Signal

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When we use fossil fuels to power our cars, homes, and businesses, we put heat-trapping carbon dioxide into the atmosphere.
Photo

Tracking Ocean Acidification

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Illustration of eddy fields in the Atlantic Ocean
Photo

Robot Explores Ocean Eddies

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An algal bloom, also known as a red tide, has converted the ocean's surf to a red color
Article

Scientists Work to Predict and Prevent Algae Blooms

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A team of scientists explore the Arctic ocean.
Slideshow

Under Arctic Ice

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Screenshot of Nancy Knowlton speaking at "Lecture: One Year After the Gulf Oil Spill"
Video

Lecture: One Year After the Gulf Oil Spill

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Globotruncana falsostuarti -- a foram that lived about 75 million years ago, during the Cretaceous Period.
Photo

Globotruncana falsostuarti

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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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