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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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A small Adélie penguin hops on a piece of ice.
Photo

Adélie Penguin Jumping Out of the Water

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Two nurse sharks hover over a baited cage
Lesson Plan

Biomes: Wild Arctic

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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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The Greenland glacier Jakobshavn Isbrae is massive, at around 40 miles long and more than a mile thick.
Article

Up Close and Personal With the Fastest Glacier in the World

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Two nurse sharks hover over a baited cage
Lesson Plan

Where Have All the Glaciers Gone?

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A team of scientists explore the Arctic ocean.
Slideshow

Under Arctic Ice

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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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data of sea ice coverage in the Arctic
Article

Arctic Sea Ice: A New Low?

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In 2011, storms and lack of ice-cover due to a warmer winter climate resulted in hundreds of seal pups being washed up on the shore of Prince Edward Island. Like many, this young seal faced an uncertain future. See more Nature's Best Photos.
Article

Ice-Loving Seals and the Loss of Sea Ice

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