Former Australian of the Year and leading melanoma researcher and pathologist , Professor Richard Scolyer, has died aged 59. In this edition of The Conversation Hour we pay tribute to him and also reflect on what it is to live with a life threatening illness.Plus, later in the program combating marine trafficking, a guide to understanding the 'beautiful game' and we catch up with botanist Tim Entwisle who has been made an Officer of the Order of Australia.