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THE ICE AT THE END OF THE WORLD
An Epic Journey Into Greenland’s Buried Past and Our Perilous Future
Jon Gertner
Random House; $28; 418 pages
More than a million years ago, snow fell on Greenland in the summer. Temperatures were low enough that it stuck, and the ice pack accumulated over the millenniums, eventually stacking higher than 10,000 feet and covering over 700,000 square miles. This frozen desert supported no life. Temperatures regularly ran dozens of degrees below zero, especially during the many months the sun declined to appear. As one 18th-century visitor recorded, the ice sheet was a frigid, deadly
