This book is part of a book series called Science Of Living Things .

There are 32 pages in this book. This book was published 2010 by Crabtree Publishing Co, US .

The author, Niki Walker, is constantly curious about what's happening in the world and why. She has written over twenty books for young people. She has also contributed to projects for CBC, Oxford University Press, McGraw-Hill Ryerson and more. She lives in Toronto, Canada.