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image of the earth with labels for the atmospheric gases
Video

Webcast: 'We Sea Change,' a Climate Change Education Video

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Pearl oysters create pearls when a hard particle is coated with calcium carbonate (nacre) after entering the oyster.
Photo

Pearls of Wisdom

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The sea star Odontaster validus and sea urchin Sterechinus neumayeri are often found living in association with one another along the Antarctic coastline, here during the Census of Marine Life.
Overview

Sea Stars, Urchins, and Relatives

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Plastic bottles and other marine debris cover a rocky beach in Curacao.
Overview

Marine Plastics

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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 blue-ringed octopus
Article

How Octopuses and Squids Change Color

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Two baby olive ridley sea turtles.
Article

Surveying Life On Sea Turtles

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A Mesozoic Ocean scene
Overview

Ocean Through Time

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Colorful corals and brittlestars on Manning Seamount off the New England coast.
Article

Seamounts: Underwater Oases

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