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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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Two nurse sharks hover over a baited cage
Lesson Plan

Where Have All the Glaciers Gone?

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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

Global Climate Change and Sea Level Rise

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Polar bears are threatened by a lack of sea ice.
Article

Climate Change at the Poles

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ice cover simulation
Video

Receding Ice Cover

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Screenshot from video of a ship amidst broken up ice.
Video

Dr. Jan Backman, Marine Geologist

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Penguins standing on ice.
Video

Animals of the Ice

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Weddell seals grind their teeth on holes in the ice to keep them open to their comings and goings between ocean and air.
Photo

Weddell Seal in Antarctic Water

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

Jakobshavn Glacier

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