The Echo Salon. Some ideas never really go away. Not even the bad ones. And events can have a butterfly effect, generating unexpected far-reaching consequences for us today. The Salon, curated in partnership with The University of Edinburgh, gives academics, writers and researchers the chance to explore with you some of the thinking, ideas and events that continue to shape our world. Every day is different at the salon. Its food for the brain, so check our daily menu for details. Join Susan Morrison, presenter of BBC Radio Scotlands Time Travels for a lively thought-provoking hour.