<DIV><DIV>Long ago there lived big cats whose giant teeth make today's cats look tame: sabertooth! Those teeth helped it compete with other predators for a meal of mammoth—or even a tasty human. </DIV><DIV> </DIV><DIV>Then, ten thousand years ago, every last sabertooth disappeared. With only ancient bones—and massive teeth—to guide them, scientists are learning amazing facts about these enormous prehistoric cats. </DIV><DIV> </DIV><DIV>Patrick O'Brien's captivating illustrations, exciting facts, and kidfriendly, comics-inspired design will thrill young adventurers.</DIV></DIV>