The human brain is naturally mathematical. But there’s one particular kind of math people have surprisingly strong feelings about — geometry. It's the secret sauce of mathematics — different from everything else, and applicable to everything from gerrymandering to human evolution to romance novels.
 

Original Air Date: May 28, 2022

Interviews In This Hour:
The 14th dimension, AI that writes romance novels, and other things explained by geometry — Did shapes make us human?

Guests:
Jordan Ellenberg, Stanislas Dehaene

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It’s summer, and you might be pulling out your binoculars, filling your bird feeders, and looking up as you hear a melodious song. But for many birdwatchers, it's not just a simple pastime. Identifying bird calls, tracking rare breeds through marshes and waters, and watching our feathered friends as they watch you has turned into true love of birds — an avian obsession.

Original Air Date: June 17, 2023

Interviews In This Hour:
'Utterly unlike other birds': The inscrutable brilliance of owls — Mark Obmascik on Competitive Bird Watching — The Indelible Myth and Meaning of Ravens — Christopher Benfey on 'A Summer of Hummingbirds'

Guests:
Jennifer Ackerman, Mark Obmascik, Charles Monroe-Kane, Christopher Benfey

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Maybe it’s your grandmother’s cinnamon cookies, the garlicky tomato sauce your spouse cooked when you were first dating, or the chicken noodle soup you made every week when your kids were little. The sights, smells and tastes of certain foods can instantly remind us of a person or transport us back to a certain time in our lives. In this episode, we’ll meet kitchen ghosts from Kentucky, hear how religion and food are intertwined, and talk about how flavor evokes emotion – from grief to joy.

Original Air Date: May 25, 2024

Interviews In This Hour:
The comfort and community of ancestral food — Slow down and take a 'flavor trip' — The perfect french fries of Kewaunee, Wisconsin — The surprising intersections of food and faith

Guests:
Crystal Wilkinson, Aimee Nezhukumatathil, Christina Ward, Joe Hardtke

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When you look at your body in the mirror, do you love what you see? Do you pick out the things you don’t like? Maybe you’ve heard of body positivity. But what if we just felt neutral about our bodies? In this episode, we talk about our bodies — how we move through the world in these fleshy vessels, how it feels to exist in our bodies in a world that asks so much from them. How do we live full and embodied lives?

Original Air Date: September 30, 2023

Interviews In This Hour:
Finding Peace in Neutrality: Jessi Kneeland on Rethinking Body Positivity — The Body Speaks: Rae Johnson on Reconnecting with Ourselves to Transform Society — Multiple Identities, One Body: Sami Schalk Discusses Black Disability Politics

Guests:
Jessi Kneeland, Rae Johnson, Sami Schalk

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We celebrate Mother's Day with a collection of stories from our archives, by and about moms. Stories about care and about courage — about the work of mothering.

Original Air Date: May 13, 2023

Guests:

Stephanie Land, Eula Biss, Jacqueline Horner Plumez, Amanda Henry, Ayelet Waldman

Before family photos, or school pictures or Instagram, there were hand-drawn and painted portraits. Throughout the ages, portrait artists have captured expressions and personalities on canvas or paper, and those who view the picture interpret this “likeness” in their own way. We talk with a philosopher, a musician and a novelist about the role of portraits through history, and how we see ourselves —and others — through these deeply personal images.

Original Air Date: September 23, 2023

Guests: 

Peter Brathwaite, Maggie O'Farrell, Steven Nadler, Thijs Gerbrandy, Norbert Middelkoop

We get the message before we’re out of training pants – when the going gets tough, look on the bright side, make lemonade out of lemons and just do it. We’re gonna consider the exact opposite – the wisdom of giving up and letting go. Because sometimes, the strongest and most courageous thing you can do is walk away.

Original Air Date: April 27, 2024

Interviews In This Hour:

The power and boundary-breaking of fasting — How do we know when to call it quits? — Escaping the tyranny of certainty

Guests:

John Oakes, Adam Phillips, Maggie Jackson

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Are you ready to think in centuries instead of seconds? Eons instead of hours? It’s time to make thousand-year plans and appreciate how Earth keeps time. 

Original Air Date: August 19, 2023

Interviews In This Hour:

Shifting your mind to 'geologic' time — Discovering the wonders of ancient cave art — Making art inspired by the ancestors

Guests:

Marcia Bjornerud, Stephen Alvarez, Dustin Illetewahke Mater

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Can neuroscience explain what happens to the brain on psychedelics? And even if we map the brain while it’s tripping, does that tell us why these experiences can be so transformative? 

We’ll talk with some of the pioneers in psychedelic research — from Amanda Feilding’s boundary-busting work to Robin Carhart-Harris’ theory of the "entropic brain." Also, renowned neuroscientist Christof Koch goes down the rabbit hole on 5-MeO-DMT, also known as toad venom.  

Original Air Date: July 15, 2023

Interviews In This Hour:

Exploring consciousness on toad venom — The godmother of the European psychedelic revival — How therapeutic psilocybin could help heal long-buried trauma — Magic mushrooms and the 'entropic brain'

Guests:

Christof Koch, Amanda Feilding, David Nutt, Robin Carhart-Harris

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From our narrow vantage point on Earth, how can we see what's out there, beyond our skies? We look to how scientists and scholars have studied eclipses, dark matter, deep-space transmissions from intelligent life and more, all in the hopes of painting a clearer picture of a vast and invisible universe.

Original Air Date: August 19, 2017

Interviews In This Hour:

How Eclipse Chasing Inspires Generations of Scientists — How Do We Investigate The Invisible Parts of the Universe? — Search For Life In All The Wrong Places — What Can You Hear In Space? — The Universe Is Under No Obligation To Make Sense To Us

Guests:

David Baron, Priya Natarajan, Seth Shostak, Don Gurnett, Neil deGrasse Tyson

Further Reading:

NASA: 2024 Eclipse Explorer

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