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January/February 2008 issue	In this issue Table of Contents Feature: Polar vision Feature: Carbon cemetery Feature: North Shore highway The Inside Story Editor's Notebook Reverberations Explorer À la carte Mosaic

Photographer Paul Nicklen likes to immerse himself in his subject. For more than a decade, the 39-year-old former biologist has gained an international reputation for diving into the chilling waters of the Arctic and Antarctic to record the wildlife that dwells — and thrives — on the margin of ice and sea. At -1.5°C, the water is so cold it numbs his legs and makes his lips swell so much that he has trouble prying the regulator out of his mouth. Nicklen is usually alone underwater, often separated from the surface by a roof of ice up to three metres thick.

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Sea ice is the matrix that sustains the web of life in the polar regions, but it is melting at an alarming rate due to global warming. Although projections vary, recent forecasts suggest that within a few decades, the Arctic basin could be ice-free in summer. Such dire predictions have sent Nicklen on a mission to show the world, through his photography, how animals such as polar bears, seals and penguins need sea ice to survive.

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