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A marine biologist measures the temperature of an ice core.
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Measuring Ice Core Temperatures

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A walrus sits on top of ice.
Article

The Cultural Icescapes of the Arctic

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Antarctica is almost entirely covered by ice sheets up to two miles (3 km) thick, which contain roughly 70% of the world’s freshwater.
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Ross Sea Ice Shelf

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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.
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Snow Petrel

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Two nurse sharks hover over a baited cage
Lesson Plan

Biomes: Wild Arctic

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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.
Article

Ice-Loving Seals and the Loss of Sea 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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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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A summertime channel carries melted ice to the sea. Antarctica and Greenland lose around 350 billion tons of ice each year from such melting.
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Ice Melt at the Poles

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data of sea ice coverage in the Arctic
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Arctic Sea Ice Extent Graph

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