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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 large red research vessel among icy waters and snowy mountains
Article

Shipboard Life in the Antarctic

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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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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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Two nurse sharks hover over a baited cage
Lesson Plan

Trophic relationships in Arctic marine ecosystems

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Diagram of narwhal anatomy and tusk function
Photo

Narwhal Anatomy

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An isopod stands on top of a glass sponge, extending its legs to find zooplankton.
Photo

Isopod in a Glass Home

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Chrysaora melanaster is a jellyfish found in the Arctic.
Photo

Arctic Sea Jelly

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Emperor penguins are the largest of the penguin species and can grow to be 100 pounds.
Photo

Emperor Penguins on the Ice

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The amphipod Eusirus holmii inhabits sea ice, the water column and the sea floor
Photo

Arctic Amphipod

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

Jakobshavn Glacier

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