MICHAEL HANLON is one of Britain's most successful science writers. He has been Science Editor at The Daily Mail for more than four years; prior to this he was at The Daily Express, The Independent and The Irish News. He contributes regularly to magazines such as The Spectator and New Statesman, and appears on TV and radio as a science pundit. He has written two popular science books to date: The Worlds of Galileo (Constable, 2001) and The Real Mars (Constable, 2004). He has helped London's Science Museum put together an exhibition celebr