For more than half a century, the fragile and frozen continent of Antarctica has been protected by ‘post-sovereign’ governing arrangements that are unusual by global standards. There are now clear signs of their breakdown. State rivalries, environmental damage and a dash for resources, including tourism revenues, are pushing the continent towards a highly uncertain future. This public forum tackles the pressing questions: What do scientists working in Antarctica have to teach us? Are military and commercial adventures becoming a reality and does Australia have a ‘national interest’ in the continent? What are the chances of reforming and strengthening the Antarctic Treaty System? Can citizens play a role in shaping its future?