
To The Best Of Our Knowledge
”To the Best of Our Knowledge” is a Peabody award-winning national public radio show that explores big ideas and beautiful questions. Deep interviews with philosophers, writers, artists, scientists, historians, and others help listeners find new sources of meaning, purpose, and wonder in daily life. Whether it’s about bees, poetry, skin, or psychedelics, every episode is an intimate, sound-rich journey into open-minded, open-hearted conversations. Warm and engaging, TTBOOK helps listeners feel less alone and more connected – to our common humanity and to the world we share.
For more from the TTBOOK team, visit us at ttbook.org.
Latest episodes

Jun 28, 2025 • 52min
Cultivating Wonder
Lulu Miller, a science and nature reporter known for her work on Radiolab, joins Dacher Keltner, a UC Berkeley psychologist uncovering the science of awe, and Jennifer Michael Hecht, a poetic historian exploring existence. They delve into rediscovering wonder through childhood perspectives and the transformative power of awe in daily life. The conversation highlights how simple moments can spark curiosity and connection, while poetry serves as a bridge to meaning in a chaotic world, enriching our experiences and relationships.

Jun 21, 2025 • 52min
How Should We Tell Our History?
Ramtin Arablouei and Rund Abdelfatah, co-hosts of NPR's ThruLine, team up with New York Times columnist Jamelle Bouie and artist Charmaine Minniefield. They dive into the contentious debates surrounding critical race theory and how history is told in America. Bouie speaks on dismantling 'civic myths', while Minniefield shares insights on Praise Houses as vital symbols of Black history. The discussion highlights the importance of diverse perspectives and the need for nuanced narratives to understand the complexities of America’s past.

Jun 14, 2025 • 52min
Cult of the Self
In the world of internet influencers and YouTube stars, it’s not enough to be ordinary anymore. You need to be special. But where did this craze for personal branding come from? Why are we so obsessed with ourselves? To understand this cult of the self, we need to go back to 19th century spiritual movements and the rise of the huckster — and also the myth of rugged individualism. But if we’re always shouting “Me me me,” what are we losing? What has it cost us?Original Air Date: February 03, 2024Interviews In This Hour: If nobody sees you online, do you exist? — How personal branding became an American religion — Why rugged individualism is a dangerous myth — The philosophers who invented the modern selfGuests: Angelo Bautista, Tara Isabella Burton, Alissa Quart, Andrea WulfNever want to miss an episode? Subscribe to the podcast.Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.

Jun 7, 2025 • 52min
Deep Time: Infinity is Forever
In a thought-provoking discussion, astrophysicist Michelle Thaller shares her journey through grief while finding solace in the cosmos. Filmmaker Jon Halperin opens up about the creation of his documentary on infinity, exploring its paradoxes and emotional impact. Meanwhile, neuroscientist Kieran Fox intertwines Einstein’s spiritual beliefs with the melancholy beauty of time and existence. Together, they tackle heavy themes like the vastness of the universe, our place within it, and how grief intertwines with cosmic wonder.

May 31, 2025 • 52min
Avian Obsessions
Jennifer Ackerman, a bird expert and author, dives into the mystical world of owls, unraveling their behavior and the myths surrounding them. Mark Obmasik shares the thrilling highs and lows of competitive bird-watching, highlighting the dedication it takes to engage in a Big Year challenge. Christopher Benfey reflects on the cultural significance of hummingbirds in the 19th century, illustrating their impact on art and spirituality. Together, they explore the passion and obsession that avian life inspires in people.

10 snips
May 24, 2025 • 52min
In Your Dreams
Rubin Naiman, a clinical psychologist specializing in sleep and dreams, joins forces with Roz Chast, a cartoonist renowned for her dream-themed memoir, Kelly Bulkeley, a researcher on the spirituality of dreaming, and Annabel Abbs-Streets, a writer exploring creativity born from sleeplessness. They dive deep into how embracing our dreams can enhance self-awareness and human connections. From combating the dream loss crisis to unraveling the spiritual significance of dreams, this lively conversation unveils the transformative potential of our night selves.

13 snips
May 17, 2025 • 52min
Beyond Death
Sebastian Junger, an acclaimed journalist and author, shares his reflections on mortality and the afterlife, stemming from his own near-death experiences. Sam Parnia, an intensive care doctor at NYU, reveals groundbreaking research on near-death phenomena and how science is reshaping our understanding of life and death. They explore harrowing personal stories, the implications of consciousness during dying, and the transformative insights gained from encounters with deceased loved ones, prompting us to rethink our existential beliefs.

May 10, 2025 • 52min
For The Love Of Moms
Stephanie Land, author of 'Made', shares gripping insights into the struggles of single motherhood, emphasizing resilience against economic hardships. Jacqueline Plumez, a psychologist and author of 'Mother Power', delves into the profound impact of motherhood on personal and political levels. Ayelet Waldman discusses her controversial essay, challenging societal expectations and advocating for mothers' own needs. Together, they highlight the balance of love, struggle, and community support in the journey of motherhood, offering empowering narratives of courage and connection.

May 3, 2025 • 52min
Love in the Time of Extinction
It can be hard to enjoy the natural world these days without anxiety. You notice a butterfly on a flower and wonder why you don’t see more. How’s the monarch population doing this year? And shouldn’t there be more bees? The challenge is to live in this time of climate change – but still find joy and refuge in it. Original Air Date: July 27, 2024Interviews In This Hour: Ecologies of love: Heather Swan’s stories of insects and the web of life — Becoming edible: Philosopher Andreas Weber’s mystical biologyGuests: Heather Swan, Andreas WeberNever want to miss an episode? Subscribe to the podcast.Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.

11 snips
Apr 26, 2025 • 52min
Docupoetry
Rooted in reality, written with a keen observer’s eye, and shaped with a sense of song, documentary poetry tells the truth in an artist’s voice. For generations, through wars, crisis, and political upheaval, documentary poets have helped make sense of some of our most difficult moments – by expressing what might otherwise be impossible to say. So what are they writing about today?This episode was produced in partnership with the Economic Hardship Reporting Project.Original Air Date: January 13, 2024Interviews In This Hour: The gospel of Suncere Ali Shakur — This is how I drew you — The poetry that bears witness to the everydayGuests: Philip Metres, Suncere Ali Shakur, Kaia Sand, Camille DungyNever want to miss an episode? Subscribe to the podcast.Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.