Big Ideas

Is the cosmos unravelling? With theoretical physicist Tony Padilla

Forget climate change, forget nuclear Armageddon, did you know that the universe is unravelling? It's probably aeons away, but according to physics, dark energy could end us all. Join award winning theoretical physicist Tony Padilla at this Sophia Club live philosophy event, to explore the torrid birth of the early universe, traverse the twisted hearts of black holes, skip through the harmonic vibrations of string theory, and ponder how, according to physics, it all might one day end.This event was recorded for the Sophia Club live philosophy in London on 21 April 2026.Speakers:Tony PadillaProfessor of physics, University of NottinghamAssociate Director of the Nottingham Centre of GravityHost, NumberfileAuthor, Fantastic numbers and where to find them: A Journey to the Edge of PhysicsSally DaviesEditorial lead for the Sophia ClubEditor, AEON magazineMusic by Oliver CoatesCellist, film composer and electronic music producer (Pillion, Aftersun and more)

A song for every feeling? Pub Choir founder Astrid Jorgensen has a big story to tell (REPEAT)

Need a mid-Winter pick me up? Well this is the conversation for you!  You could call Astrid Jorgensen a choir conductor, but that really doesn’t capture what she does and the global phenomenon she’s created. On any one night, anywhere in the world, you’ll find Astrid on a stage in front of a few thousand people singing their hearts out. She’s the founder, the composer, and the host of Pub Choir — which has been described as the world’s biggest one night stand in song. But for a while there she could have become a nun. Yes, there's so much more to her story, and she joins Big Ideas' host Natasha Mitchell to tell it.This event, organised by Northern Books, was held at the Fitzroy Town Hall in Naarm/Melbourne.This episode was first aired on the 10 December 2025.SpeakerAstrid JorgensenFounder and conductor of Pub ChoirAuthor, Average At Best (Simon and Schuster Australia, 2025)Further informationHow Astrid Jorgensen turned a suburban pub choir into a worldwide musical phenomenon (Australian Story/ABC News, 2025)Watch Australian Story episode about Astrid on Youtube (2025)

The gambling industry is targeting your children - how, why and what can be done?

The gambling industry is targeting young people through digital platforms, personalised algorithms and the blurring line between gaming and betting. But also off-line, at the pokies, we see younger faces. We explore the strategies behind this trend, the human costs and what it would actually take to change the culture and the regulation around gambling in Australia.This conversation is a cooperation with Shaun Micallef's Going for Broke, the new ABC three-part documentary series that you can find on ABC iView.SpeakersDr Charles LivingstoneAssociate Professor in the School of Public Health and Preventive Medicine, Monash UniversityMark KempsterLived Experience Advocate with the Alliance for Gambling ReformReverend Stu CameronCEO and Superintendent of Wesley MissionDr Sally GainsburyAssociate Professor of Psychology and co-Director of the University of Sydney Gambling Treatment and Research ClinicSteve Cannane (host)Reporter with the ABC's Investigations UnitABC Four Corners by Steve Cannane – Losing StreakFurther informationNational Gambling Helpline 1800 858 858Wesley Mission Gamble Aware

David Marr on preaching to the converted

The arc of the moral universe may bend toward justice, but not without a whole lot of committed individuals doggedly banging on about it. Even when no one's listening, even when it's boring, even when it takes years or even lifetimes. So in this time of division and fracture, when hearts and minds seem out of reach, is there still value in preaching to the like-minded?The 2026 Sheila Drummond Memorial Lecture was recorded at the Woodend Winter Arts Festival on 6 June 2026.Speakers:David MarrPresent Late Night Live, ABC Radio NationalAuthor, Killing for Country: A Family Story, Patrick White. A Life, Political Animal: The Making of Tony Abbott (Quarterly Essay) and more

The God we made — safeguarding humanity in the age of AI

It is replacing our work, our relationships, even our capacity to think. It's the combined sum of all human knowledge — so how long until artificial intelligence surpasses our own? Are we already there? In her latest Quarterly Essay, Anna Goldsworthy confronts a near future where humans are no longer the most intelligent beings, inviting us to consider what is irreplaceable in us, in what we do, and what we want for our lives.This conversation was recorded on 8 June 2026 at Woodend Winter Arts Festival.Speakers:Anna GoldsworthyAuthor, The God we made — the threat and promise of artificial intelligence, Quarterly Essay #102 and many moreClassical pianist, founding member, Seraphim TrioDean of the Elder Conservatorium of Music and School of Performing Arts, Adelaide University, and incoming Artistic Director of the Australian National Academy of MusicJacqueline OgeilHarpsichordist, conductor, music teacherFounder and director, Woodend Winter Arts FestivalFurther information:Magnifica Humanitas - on safeguarding the human person in the time of artificial intelligence - Encyclical letter by Pope Leo XIV