http://downloads.bbc.co.uk/podcasts/worldservice/forum/forum_20090329-0900a.mp3 Forum: 28 Mar 09 Carl Djerassi Mary Beard Harold Varmus http://downloads.bbc.co.uk/podcasts/worldservice/forum/forum_20090329-0900a.mp3 2009-03-29 http://www.bbc.co.uk/podcasts/assets/artwork/forum.jpg