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What is a fossil? Sometimes its the imprint of an ancient leaf in a rock. Or it could be the skeleton of a dinosaur that has turned to stone! With clear prose and lovely, full-color illustrations, award-winning author and illustrator Aliki describes the different ways fossils are formed and what they tell us about life on Earth long ago. This revised edition of the classic picture book features updated text and also includes an activity guide so kids can create their own fossils for someone to find a million years from now.
