Millions of years ago, dinosaurs left their footprints all over the earth. With each discovery of a dinosaur footprint, ichnologists--scientists who study dinosaur tracks--learn more about these ancient creatures and the world they lived in. Read and find out how to step back into history through the footprint of a dinosaur.

This book is part of a book series called Dinosaur .

There are 33 pages in this book. This is a reference book. This book was published 2007 by HarperCollins Publishers Inc .

KATHLEEN WEIDNER ZOEHFELD has been a children's books editor and writer for thirty years and have always kept one eye on curriculum needs, especially in science. She has written other books in the National Geographic Kids Readers series including, Dinosaurs and Rocks and Minerals .