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A shell placed in seawater with increased acidity slowly dissolves over 45 days.
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Shell Dissolves in Seawater

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Sea lion with data collector on back.
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Sea lion with data collector on back

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Oceanographers divide the ocean into three broad zones, each with different species.
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Zones of the Open Ocean

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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.
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Tracking Ocean Acidification

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Hurricane Wind Pattern in Gulf of Mexico
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NOAA's Real Time Weather Mapping

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

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Screenshot from the video with illustrations of tiny ocean microbes.
Video

How a Microscopic Team Alters the Course of Carbon in the Atlantic Ocean

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A walrus sits on top of ice.
Article

The Cultural Icescapes of the Arctic

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Two nurse sharks hover over a baited cage
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Trophic relationships in Arctic marine ecosystems

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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.
Article

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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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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