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Walruses use sea ice as platforms on which to nurse their young and launch their dives.
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Walrus Rests on Ice

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Two nurse sharks hover over a baited cage
Lesson Plan

Global Climate Change and Sea Level Rise

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Looking through this iceberg's reflection in the Antarctic water, you can see the iceberg below the surface—some 90% of its total volume.
Overview

The Arctic and The Antarctic

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Human activity is increasing in the Arctic marine environment due to climate change. To help the most vulnerable areas, the Global Marine Program of IUCN, along with partners, is convening a series of workshops aimed at enhancing ecosystem-based management and identifying biologically or ecologically important or vulnerable habitats. Burgerbukta, a bay in Svalbard, Norway, is being managed for ecosystem protection.
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The Sant Ocean Hall: Life at the Poles Exhibit

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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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Polar bears are threatened by a lack of sea ice.
Article

Climate Change at the Poles

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Two nurse sharks hover over a baited cage
Lesson Plan

Biomes: Wild Arctic

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Every year as the sun disappears for the winter, the surface waters around Antarctica freeze into a slab of ice 10-feet thick, which effectively doubles the size of the continent.
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Antarctic Pack Ice

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

Measuring Ice Core Temperatures

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A narwhal breaches the surface, its tusk pointed to the sky
Article

Why a Tusk? The real-life unicorns of the sea and the tusks that make them famous

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A walrus sits on top of ice.
Article

The Cultural Icescapes of the Arctic

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Two nurse sharks hover over a baited cage
Lesson Plan

Where Have All the Glaciers Gone?

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