Long ago there lived big cats whose giant teeth make todays cats look tame sabertooth! Those teeth helped it compete with other predators for a meal of mammothor even a tasty human. Then, ten thousand years ago, every last sabertooth disappeared. With only ancient bonesand massive teethto guide them, scientists are learning amazing facts about these enormous prehistoric cats. Patrick OBriens captivating illustrations, exciting facts, and kidfriendly, comicsinspired design will thrill young adventurers.
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