<p>Infinity is a profoundly counter-intuitive and brain-twisting subject that has inspired some great thinkers ? and provoked and shocked others.<br><br>The ancient Greeks were so horrified by the implications of an endless number that they drowned the man who gave away the secret. And a German mathematician was driven mad by the repercussions of his discovery of transfinite numbers.<br><br>Brian Clegg and Oliver Pugh's brilliant graphic tour of ...