"Put your mittens on; you'll freeze to death " admonish the world's grandmothers as the temperature plummets. No doubt the Arctic explorers--today in their GORE-TEX, historically in their woolens--needed no such instruction. Icy climes bring with them the dangers of frostbite, but also the poetic beauty of glaciers and ice shelves, of ice palaces and aurora borealis. Karal Ann Marling explores these topics and more as she considers the history of...