This book is part of a book series called Know About .

There are 32 pages in this book. This book was published 2010 by National Maritime Museum .

Mary and John Gribbin are well-known popular science authors who write for both adults and children. Children's titles include Time and Space (DK), What's the Big Idea? Time and the Universe (Hodder) Smelly Science (OUP) and the very recent The Science of Philip Pullman's His Dark Materials (Hodder).