This book is part of a book series called Digging Up the Past .

This book has been graded for interest at 11-17 years.

This book was published 2014 by Essential Library .

Lisa J. Amstutz is the author of more than 30 nonfiction books for children and many magazine and newspaper articles. Her background includes a B. A. in Biology and an M. S. in Environmental Science/Ecology. She loves sharing amazing facts about science and nature with kids.