More than 40,000 years ago, the earth was ruled by megafauna: mammoths and mastodons, saber-toothed tigers and giant sloths. But evolution and the arrival of the wildly adaptive human species have led to extinction for many of these giants. Globalization, beginning with Columbus, has already destroyed the black rhino, the giant tortoise, and the great auk; but for other species, there is still time. 'Last of the Giants' chronicles these giant animals, and provides an astonishing portrait of an ancient world that is vanishing before our very eyes. AGES: 12 and up AUTHOR: Jeff Campbell is an editor of nonfiction books on animals and the author of 'Daisy to the Rescue'. Currently, Jeff teaches creative writing.