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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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Two nurse sharks hover over a baited cage
Lesson Plan

Realms of the Arctic Ocean: pelagic, benthic and sea ice

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Two nurse sharks hover over a baited cage
Lesson Plan

Biomes: Wild Arctic

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Two nurse sharks hover over a baited cage
Lesson Plan

Frozen Out

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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 team of scientists explore the Arctic ocean.
Slideshow

Under Arctic Ice

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This recently discovered hairy crab species (Kiwa hirsuta) has no eyes.
Overview

The Census of Marine Life

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