This book is part of a book series called Why Why Why .

There are 32 pages in this book. This book was published 2008 by Miles Kelly Publishing Ltd .

Chris Oxlade is an experienced writer of children's non-fiction and specialises in scientific subjects. Camilla de la Bedoyere has written more than 250 books for children, covering a wide range of topics, from nature and science to maths and geography. Catherine Chambers is an experienced writer of information books for children.