Podcast
Ideas
Hosted by CBC · EN
IDEAS is a place for people who like to think. If you value deep conversation and unexpected reveals, this show is for you. From the roots and rise of authoritarianism to near-death experiences to the history of toilets, no topic is off-limits. Hosted by Nahlah Ayed, we’re home to immersive documentaries and fascinating interviews with some of the most consequential thinkers of our time.
With an award-winning team, our podcast has proud roots in its 60-year history with CBC Radio, exploring the IDEAS that make us who we are.
New episodes drop Monday through Friday at 5pm ET.
104episodes
Episodes
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4 is a rule maker and rule breaker | The Greatest Numbers of All Time
2d ago00:54:07Tap to summarizeFrom the medicine wheel to the building blocks of DNA, the number four has represented structure and stability. But four is also a troublemaker: a portal to realms like the fourth dimension. Our series, The Greatest Numbers of All Time explores how the number four helps us understand the world — both by making the rules, and by breaking them. More in the series:Listen to The Curse of 13Listen to 12 is SublimeListen to 27 Club LoreListen to The 33,000 Horsepower GamechangerGuests in this episode:Joyce Perreault is an Ojibway Anishinaabe children's book author and elementary school teacher at Donald Ahmo School in Crane River, MB.Brian Katz is a composer, instrumentalist, improviser, and guitar instructor at University of Toronto and York University.Lauren Fink is a professor of cognitive neuroscience at McMaster University.Alex Fisher is a professor of musicology and area coordinator for early music at the University of British Columbia.Tyrone Ghaswala is an assistant professor teaching stream with the Centre for Education and Computing (CEMC) and an adjunct professor in the Pure Mathematics department at the University of Waterloo. Wenran Jiang is the founding director of the China Institute at the University of Alberta. Stephan Reuter is an associate professor for plasma physics and spectroscopy at the Engineering Physics Department of Polytechnique Montréal Sarah Hart is professor emerita of mathematics at Birkbeck College and author of "Once Upon a Prime: The Wondrous Connections between Mathematics and Literature."
Transcribe →The 33,000 Horsepower Gamechanger | The Greatest Numbers of All Time
3d ago00:54:08Tap to summarizeThere is nothing random about featuring 33,000 in our number series. It's very powerful. So much so, that the number put millions of horses out of work. Inventor James Watt used “33,000 foot-pounds a minute" to measure the capabilities of a horse when trying to market his new and improved steam engine. The engine was a big success, saving horses from the drudgery of manual labour. Now, a similar process is underway with artificial intelligence — but are we the horses, or the steam engine? *This episode is part of our series, The Greatest Numbers of All Time.For more in the series:Listen to The Curse of 13Listen to 12 is SublimeListen to 27 Club LoreGuest in this episode:Stephanie Dick is a historian of mathematics, technology, computing, and AI, and an assistant professor at Simon Fraser University.
Transcribe →27 Club Lore | The Greatest Numbers of All Time
4d ago00:54:08Tap to summarizeTwenty-seven can be a pivotal and tumultuous age. It’s held up as the year of peak performance in many sports and it's also seen as a cursed age for pop and rock stars, exemplified by the so-called 27 Club. Artists like Jimi Hendrix, Janis Joplin, Kurt Cobain and Amy Winehouse, all died at 27. As part of our series, The Greatest Numbers of All Time, IDEAS producer Chris Wodskou makes the case for a number that may not stick out in your mind but is more significant than you think.More episodes in this series:Listen to 12 is SublimeListen to The Curse of 13Listen to The 33,000 Horsepower GamechangerGuests in this podcast:David Awosoga is a PhD student in Statistics at University of Waterloo and sports performance data analyst.Alan Cross is a music historian, broadcaster, and host of The Ongoing History of New Music podcastDianna Kenny is a professor emerita of psychology and music at University of Sydney and psychotherapist in private practice.Michael Owen is a retired clinical psychologist and author of The 27 Club.Maria Westerstahl is senior lecturer at Karolinska Institutet in Sweden.
Transcribe →12 is Sublime | The Greatest Numbers of All Time
5d ago00:54:08Tap to summarizeComplete. Whole. Divine order. That's just the start of what makes the humble dozen extraordinary. It's one of only two numbers ever discovered in mathematics to be “sublime.” Twelve makes a number of appearances in pop culture, in religion, in non-fiction, everything from the 12 days of Christmas to the 12 people it takes to form a criminal jury. Still need convincing of 12’s perfection and indispensability? Check your watch.More episodes in our series, The Greatest Numbers of All Time:Listen to The Curse of 13Listen to 27 Club LoreListen to The 33,000 Horsepower GamechangerGuests in this episode:Glen Van Brummelen is a professor of mathematical sciences at Trinity Western University.Ainsley Hawthorn is a cultural historian and nonfiction writer. She has a PhD in Near Eastern Civilizations from Yale University.
Transcribe →The Curse of 13 | The Greatest Numbers of All Time
6d ago00:54:08Tap to summarizeHas there ever been a number more maligned in western culture than 13? So feared, it's got its own horror-film franchise. So infamously unlucky, a good many of us avoid it en masse. We've just blindly accepted its bad reputation. As part of our series, The Greatest Numbers of All Time, IDEAS explores where our irrational fear and uncomfortable feelings about 13 began. *All five episodes in our number series will be available daily in our feed this week.*Listen to 12 is SublimeListen to 27 Club LoreListen to The 33,000 Horsepower GamechangerGuests in this episode:Stephen Winick is a folk life specialist at the American Folklife Center of the Library of Congress.Barry Markovsky is distinguished professor emeritus of sociology at University of South Carolina. His latest book is Everyday Extraordinary: A Scientist Ponders a Lifetime of Magical, Bizarre, and Paranormal Experiences.Claire Potter is an author of parenting books, including Getting the Little Blighters to Behave and the creator of the online programme Tiny Bites for parents of picky eaters.Rabbi Heschel Greenberg is the founder and director of the Jewish Discovery Center in Buffalo, New York. He has written many books including Tefillin: Judaism's Crown.
Transcribe →Why moral suffering can be a good thing
1w ago00:54:08Tap to summarizeIt's tempting to think suffering should be avoided at all costs, but moral suffering has its own distinct standing. It signals a moral conscience. Every day people consume real time violence, grief, war and genocide through screens and experience moral upending. Without a moral compass there’s no motivation to address necessary issues.Guests in this episode:Cynda Rushton is a nurse and a professor of nursing and bioethics at Johns Hopkins University.Robert Meagher is an emeritus professor at Hampshire College in Amherst, Massachusetts.Thea Lim is a novelist, culture writer, and creative writing teacher in Toronto.
Transcribe →What if God is the possibility of the impossible?
2w ago00:54:08Tap to summarizeFormer IDEAS writer-broadcaster David Cayley passed away at his home on Wednesday June 10, surrounded by family. To honour his legacy, we wanted to share part of a 2006 conversation David had with Irish philosopher Richard Kearney on the space for theism within atheism, and/or atheism within theism.Richard Kearney is a philosophy professor at Boston College and University College, Dublin. He has written many books on modern philosophy and culture, including The God Who May Be: A Hermeneutics of Religion and Anatheism: Returning to God After God.
Transcribe →From Dua Lipa to Broadway, Houdini never disappears
2w ago00:54:08Tap to summarizeThere may be no one alive who saw Houdini perform magic. Yet we still know his name and his legend. Dua Lipa namechecked the escape artist in a 2023 dance hit and she's not alone. Houdini is still a cultural reference point, despite having died 100 years ago. And that’s pretty much what he would have wanted. IDEAS explores why his name persists in our imaginations and how his magic helped his family escape poverty.Guests in this episode:Adam Begley is a biographer living in London, and author of Houdini: The Elusive American.David Ben is a conjuror, writer, and consultant in Toronto. He’s writing a graphic novel featuring an imagined adventure for Houdini.Katie Bender is a playwright and actor. Her interactive performance about Houdini is called Instructions for a Seance.
Transcribe →Without justice, can unbearable grief subside?
2w ago00:54:07Tap to summarizeSujata Berry's brother, Sharad was 16 years old when he was killed. He was aboard Air India Flight 182 when it exploded off the coast of Ireland on June 23, 1985. It's considered the worst terror attack in Canadian history. For Sujata, the shock of his horrific death morphed into an unshakeable grief. The family's sorrow was augmented with the lack of justice for victims' families — a flawed investigation, evidence lost and what Sujata says was "an unsatisfactory verdict." It's taken Sujata 40 years to chip away at her grief and try to understand what happened to her and her family. She explores love, loss and the grief that binds them in her documentary, All that Remains. *This episode originally aired on Sept. 17, 2025.Read Sujata's personal essay with pictures
Transcribe →The unforgivable crime of being queer in Africa
2w ago00:54:08Tap to summarizeHomosexuality is illegal in more than half of African countries — a crime punishable by prison sentences. Or in some cases: death. In the past few years, six African countries have made it illegal just to advocate for LGBTQ+ rights. These laws bring up questions of foreign influence, neo-colonialism, and the role the international community could play in nudging human rights on the continent. *This episode originally aired on May 26, 2025.Want another podcast? Ghana and Uganda have some of the harshest laws against LGBTQ+ people in the world. Despite the threats, listen to how podcasters in both these countries are fighting back and reclaiming sexuality.
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