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A team of scientists explore the Arctic ocean.
Slideshow

Under Arctic Ice

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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 robotic underwater glider Scarlet Knight crossed the Atlantic over the course of several months in 2009.
Article

Underwater Robots Explore the Ocean

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

Sea Level Rise

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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 shell placed in seawater with increased acidity slowly dissolves over 45 days.
Overview

Ocean Acidification

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