Episode Archives

Filter episodes by the year they originally aired.
TTBOOK and CHN present Deep Time

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

Original Air Date:

August 19, 2023

TTBOOK Presents Luminous with Gul Dolen

Gul Dolen is a pioneering neuroscientist who's investigating the “critical periods” of psychedelics, including studies where she's given MDMA — also known as “Molly” — to octopuses. Read more

Original Air Date:

August 12, 2023

crying child

We all feel better after a good cry. In fact, humans are the only animals who cry emotional tears. But what about people who don't cry? And have you ever wondered why a sad song or movie makes you cry?Read more

Original Air Date:

August 05, 2023

TTBOOK Presents Luminous

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? Read more

Original Air Date:

July 15, 2023


The rock icon explains why she’s fascinated by psychedelics as a promising treatment for addiction, a path for spiritual exploration, and a source of creativity.Read more

Original Air Date:

July 08, 2023

"A roadtrip across time and space"

For a lot of Americans, summer means that it's time to hit the open road. We take road trips and endless highways for granted, but there are other countries where people can pay a heavy price just for getting behind a wheel.Read more

Original Air Date:

July 01, 2023

An owl

For many birdwatchers, identifying bird calls, tracking rare breeds through marshes and waters, and watching our feathered friends is more than just a pastime — it's a calling.Read more

Original Air Date:

June 17, 2023

TTBOOK and Center for Humans and Nature present Deep Time

When you’re on the clock, you’re always running out of time. The relentless countdown is making us and the planet sick. But clock time isn’t the only kind. There are older, deeper rhythms of natural time.  We just forgot how to listen.Read more

Original Air Date:

June 03, 2023

To The Best of out Knowledge presents Luminous

In this episode of "Luminous," we go inside Usona Institute’s chemistry lab and go deep with co-founder Bill Linton about what brought him to this unique moment in the psychedelic revolution.  Read more

Original Air Date:

May 17, 2023

A mother and child

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.Read more

Original Air Date:

May 13, 2023

Clockwise from the left: a fossilized leaf, an orangutan, a rowing team, a microscope view

In some of our favorite science interviews — discover the joy of studying fossils, the invention of a paper microscope, and the astrophysics of making a hard-boiled egg.Read more

Original Air Date:

April 22, 2023

TTBOOK Presents Luminous episode 1. A door with magical colors coming out.

In the first episode in our series about psychedelics, how can psilocybin ease our fears about dying and help us make peace with the end of our lives?Read more

Original Air Date:

April 08, 2023

A shattered person.

You're not even out of bed and you're already worrying. So let's talk about it: How anxious we are, how we got that way, and what to do about it.Read more

Original Air Date:

March 25, 2023

A wonderous wood

Maybe there’s something missing in your life you can’t quite explain. It might be that you need to re-discover your sense of wonder.Read more

Original Air Date:

March 18, 2023

an infinite bookcase

Debates over American history are front-page news, and a new generation of public historians is re-shaping our national narrative.Read more

Original Air Date:

February 25, 2023

the many ills of capitalism

Radical politics and radical movements are on the rise everywhere. Maybe they're all — in one way or another — a rebellion against capitalism.Read more

Original Air Date:

February 11, 2023

Athlete Jim Thorpe

A Native American hero — one of the greatest athletes the world has ever known — is now being celebrated by a new generation.Read more

Original Air Date:

January 14, 2023

an african imagination of the future.

Wakanda is a very American version of an idealized African future. So how do African science fiction writers tell stories about their own imagined future?Read more

Original Air Date:

December 10, 2022

workers waiting for a job interview

In this final part of our series, we’re talking about work — specifically the right to meaningful work.Read more

Original Air Date:

November 19, 2022

An X-ray of a mind

PTSD and other mental health challenges can push people into poverty. How do you break the cycle? How do we truly care for people mentally and financially?Read more

Original Air Date:

November 12, 2022

a row of apartment buildings

In the first of three episodes of "Going For Broke" all about the care economy, we're thinking about housing. Many of us would consider it a basic human right. But in America, it can be hard to come by.Read more

Original Air Date:

November 05, 2022

a woman before a swirling blackhole

When the real world becomes too much, fantasy might be your ticket out. But at what point does fantasy go too far?Read more

Original Air Date:

September 17, 2022

kente cloth landscape

2019 marked the "year of return" to Ghana. Now, scores of African-Americans are moving to Ghana permanently – giving up on the country of their birth.Read more

Original Air Date:

September 03, 2022

an abstract image of an angry mob carrying flags

Around the world, authoritarian leaders are on the rise – from Russia and Hungary to the U.S. We examine the return of the Strongman — and how to save democracy.Read more

Original Air Date:

August 13, 2022