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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

Monsters of the Deep

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Two nurse sharks hover over a baited cage
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Where There’s Smoke…

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Two nurse sharks hover over a baited cage
Lesson Plan

Let’s Make a Tubeworm

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Two nurse sharks hover over a baited cage
Lesson Plan

Off Base

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A photo of a red-colored sea anemone photographed in the Baltic Sea.
Photo

Urticina Felina, a Baltic Sea Anemone

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A marine biologist measures the temperature of an ice core.
Photo

Measuring Ice Core Temperatures

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An algal bloom, also known as a red tide, has converted the ocean's surf to a red color
Article

Scientists Work to Predict and Prevent Algae Blooms

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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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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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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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