Bert,

David Attendborough couldn't remember who it was - he mentioned a famous ancient Greek - it might even have been Aeschyllus. It was just a passing reference, so I don't know any more details.

CH,

If you enjoy reading fantasy/SciFi or humourous fiction then Terry Pratchett is well worth checking out. His nearest literary comparison could be Douglas Adams - Hitchiker's Guide to the Galaxy. The Discworld series is based on a world which balances on the back of a giant turtle in space.

Helen