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A team of scientists explore the Arctic ocean.
Slideshow

Under Arctic Ice

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Snow petrels hunt in Antarctic sea ice, feeding on krill and fish.
Photo

Snow Petrel

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

Measuring Ice Core Temperatures

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

Walrus Rests on Ice

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On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
Photo

Ice Melt in Iceland

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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 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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ice cover simulation
Video

Receding Ice Cover

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A summertime channel carries melted ice to the sea. Antarctica and Greenland lose around 350 billion tons of ice each year from such melting.
Photo

Ice Melt 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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Two nurse sharks hover over a baited cage
Lesson Plan

Biomes: Wild Arctic

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data of sea ice coverage in the Arctic
Article

Arctic Sea Ice: A New Low?

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