"Matthiessen chronicles two voyages into the frozen seas that surround a landmass larger than the continental United States, most of it buried under eternal snow and ice as much as three miles deep. Ninety percent of the world's fresh water is locked in this immense ice cap, a remote region profoundly important to our environment. The author addresses the subject with authority and passion, discussing everything from global warming and the ozone layer to the vital role of krill, the teeming crustacean that is the cornerstone of the marine food chain." "Nature lovers - birders especially - will be fascinated by descriptions of more than half of the penguin species and an astonishing array of seabirds, from tiny storm-petrels to magnificent albatrosses, which may soar for years without alighting on land; here too are close encounters with whales, leopard seals, and elephant seals, and elusive creatures such as the oceanic orca. There are also remarkable descriptions of the seldom seen polar rookeries where thousands of emperor penguins stand motionless for months at a time, brooding their giant eggs through the long, cold darkness of Antarctic winter."--BOOK JACKET.