Stegosaurus had spikes along its back. Triceratops had long, sharp horns. Tyrannosaurus rex was enormous. Millions and millions of years before the first people lived, these fascinating creatures ruled the Earth. To find out where they came from, you have to look way back in time ...3.5 billion years ago! Come explore the biggest mystery of all: Where did dinosaurs come from? Read and find out!

 

This book is part of a book series called Dinosaur .

There are 40 pages in this book. This is a reference book. This book was published 2011 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 .