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UV light illuminates growth rings in a cross-section of 44-year-old Primnoa resedaformis coral found about 400 m (1,312 ft) deep off Newfoundland.
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Coral Growth Rings

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A walrus sits on top of ice.
Article

The Cultural Icescapes of the Arctic

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

Ocean Acidification

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

Climate Change at the Poles

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

Sea Level Rise

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data of sea ice coverage in the Arctic
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Arctic Sea Ice: A New Low?

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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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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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An underwater blizzard of oil, marine microbes, "sea snot", and algae.
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Five Questions with Uta Passow, How An Oil Spill Affects the Movement of Carbon In the Ocean

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