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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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A Mesozoic Ocean scene
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Ocean Through Time

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two images cropped together of women at desks facing each other
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An Irrepressible Wave

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Great hammerhead in Bimini, Bahamas.
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Sharks

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Two Adélie penguins on Paulet Island, Antarctica
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Penguins

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Two octopuses sitting underwater highlight the different textures the animals can take on.
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Octopuses, Squids, and Relatives

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two humpback whales swim underwater
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Whales and Dolphins

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