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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.
Photo

Harp Seal, Prince Edward Island National Park, Canada

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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

Biomes: Wild Arctic

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

Sea Level Rise

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