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Two nurse sharks hover over a baited cage
Lesson Plan

This Old Tubeworm

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Two nurse sharks hover over a baited cage
Lesson Plan

Let’s Make a Tubeworm

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The robotic underwater glider Scarlet Knight crossed the Atlantic over the course of several months in 2009.
Article

Underwater Robots Explore the Ocean

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Two nurse sharks hover over a baited cage
Lesson Plan

Monsters of the Deep

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Two nurse sharks hover over a baited cage
Lesson Plan

Trophic relationships in Arctic marine ecosystems

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Two nurse sharks hover over a baited cage
Lesson Plan

Corrosion to Corals

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Two nurse sharks hover over a baited cage
Lesson Plan

Off Base

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

Ocean Acidification

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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 walrus sits on top of ice.
Article

The Cultural Icescapes of the Arctic

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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.
Photo

Coral Growth Rings

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