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 book also includes an activity guide so kids can create their own fossils for someone to find a million years from now. This is a Stage 2 Lets-Read-and-Find-Out, which means the book explores more challenging concepts for children in the primary grades. Lets-Read-And- Find-Out is the winner of the American Association for the Advancement of Science/Subaru Science Books and Films Prize for Outstanding Science Series. Supports the Common Core Learning Standards and Next Generation Science Standards What is a fossil? Sometimes its the imprint of an ancient leaf in a rock. Sometimes its a woolly mammoth, frozen for thousands of years in the icy ground. Sometimes its the skeleton of a stegosaurus that has turned to stone. A fossil is anything that has been preserved, one way or another, that tells about life on Earth. But you can make a fossil, too--something to be discovered a million years from now--and this book will tell you how.