Petrified forests are some of the coolest-looking fossils that scientists find and study. They can tell us so much about the past, including what Earth was like before humans arrived. How do these amazing remains form? Why? Readers can find the answers to these questions within the pages of this book, complete with close-up photographs of petrified wood they might never otherwise see. The age-appropriate narrative supports science class learning and fun fact boxes give readers even more information about these amazing fossils.