This book is part of a book series called National Geographic Science Chapters .

This book has been graded for interest at 7-10 years.

There are 40 pages in this book. This is a chapter book. Publishers market early chapter books at readers aged 6-10 years. This book was published 2006 by National Geographic Society .

Pamela Rushby is a well- known, award-winning Australian author. Her YA title When the Hipchicks Went to War won the Ethel Turner Prize in the 2010 NSW Premier's Awards. HCPA published Circles of Stone in 2003 and The Horses Didn't Come Home in 2012. Pam lives in Brisbane.