This book is part of a book series called Question Time .

This book has been graded for interest at 5-8 years.

This book was published 2001 by Kingfisher .

Professor Charles Taylor received the U. K. 's Bragg Medal and Prize of Institutional Physics, and the UK's Michael Faraday Award for contributions to the public understanding of science. He has presented lectures on BBC television and has written many science books for children.