This book is part of a book series called 100 Facts You Should Know .

This book has been graded for interest at 8-12 years.

There are 48 pages in this book. This book was published 2016 by Gareth Stevens Publishing .

John Farndon has written many books for children, specialising in popular science and astronomy. He has twice been shortlisted for the "Copus Science Book Prize. "