This book is part of a book series called Current Science .

This book has been graded for interest at 9-12 years.

There are 48 pages in this book. This book was published 2009 by Gareth Stevens Publishing .

Kristi Lew is a former high school science teacher with degrees in biochemistry and genetics. After years in the classroom and cytogenetics laboratories, she is now the owner of a professional K-12 educational writing service that specializes in writing nonfiction science books for students and teachers.