On Thin IceBy: Richard Ellis From "a graceful writer whos written some of the best natural history books of the past decade (The New York Times Book Review) comes an urgent, stirring celebration and a rallying cry on behalf of one of earth's greatest natural treasures. Polar bearsfierce and majestichave captivated us for centuries. Feared by explorers, revered by the Inuit, and beloved by zoo goers everywhere, they are a symbol for the harsh beauty and muscular