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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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A walrus sits on top of ice.
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The Cultural Icescapes of the Arctic

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

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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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Polar bears are threatened by a lack of sea ice.
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Climate Change at the Poles

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

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