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Radiolab is on a curiosity bender. We ask deep questions and use investigative journalism to get the answers. A given episode might whirl you through science, legal history, and into the home of someone halfway across the world. The show is known for innovative sound design, smashing information into music. It is hosted by Lulu Miller and Latif Nasser.© WNYC Studios Nature et écologie Science Sciences sociales
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  • Grass Apes

    Grass Apes
    Sep 25 2026

    When you think about grass, what do you think of? Pool parties? Suburbs? Allergies? What about: human history? It turns out, unassuming grass, which exists on every continent, has an epic story to tell. One of transforming the planet, and … us. From what we eat, to how our body might be shaped and the ways we perceive the world. Senior Correspondent Molly Webster speaks to biologist and writer David George Haskell in this tiny ode to Grass.

    This episode was inspired by “Grass Fed”, a Radiolab outdoor theatre performance at Little Island in New York City. “Grass Fed” featured biologist and writer David George Haskell; Foley artist Steven Wendt; and dance company, Pilobolus. Special thanks to all the artists, and to Little Island, Sarah Sandbach, Natalia Ramirez, and Soren Wheeler.

    EPISODE CREDITS:
    Hosted by - Molly Webster
    Reported by - Molly Webster
    with help from - Jo Strogatz and Anisa Vietze
    Produced by - Sarah Qari
    with help from - Jo Strogatz, Molly Webster
    Original vocals from - Jo Strogatz
    with mixing from - Jeremy S. Bloom
    Fact-checking by - Nora Belblidia
    and Edited by - Pat Walters

    EPISODE CITATIONS:

    Articles -

    • The Other Almanac 2026 (https://www.otheralmanac.com/), by David George Haskell a print-only magazine contains an essay All Hail Grass, Maker of Humans! by David George Haskell all about grass’s role in human history.

    Books -

    • How Flowers Made Our World” (https://zpr.io/r4ybZJea8WV9) by David George Haskell which has a chapter all about grass in it (it’s a flowering plant, if you didn’t know!)

    Sign up for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Signup (https://radiolab.org/newsletter)!

    Radiolab is supported by listeners like you. Support Radiolab by becoming a member of The Lab (https://members.radiolab.org/) today.

    Follow our show on Instagram, Twitter and Facebook @radiolab, and share your thoughts with us by emailing radiolab@wnyc.org.


    Leadership support for Radiolab’s science programming is provided by the Simons Foundation and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.



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    22 min
  • The Sweetest Thing

    The Sweetest Thing
    Sep 18 2026
    “What is the sweetest thing in the world?” After co-host Latif Nasser’s sons ask him this deceptively simple question, he goes on a quest to find it. Is it a West African Katemfe berry? Or an industrial sugar substitute cooked up in a lab? Or an ingredient hiding in plain sight in all of our pantries? A simple mystery that will make you question what sweetness even is, how our tongues (and other body parts you wouldn’t expect) determine what we like, and how far you would go to taste something sweeter than anyone has ever experienced. Thank you to Latif’s sons for indulging us, to Nicola Twilley and Cynthia Graber at Gastropod, to Anni Laffitte, Nazli Parvizi at Museum of Food and Drink, to food icons Claire Saffitz and Sam Seneveratne who did a live show version of this episode with us at the Tribeca Festival. And thank you to Davy Gardner and his wonderful team of audio folks at the Tribeca Festival.Thank you to Jialin Deng who composed the song that was our ‘sonic seasoning’. And to Laura Rickman and everyone else at Columbia University’s Mortimer B Zuckerman Mind Brain Behavior Institute for hosting us. And big thanks to experimental psychologist Charles Spence at Oxford, sweetness chemist Grant DuBois, Danielle Reed at Monell Chemical Senses Center, and nutritional scientist Sarah Berry at King’s College London who all talked to us about their research. And Brian Everett of Honest Organic Farms.And a very special thanks to Sean Oomens, inventor of producer Jess Yung’s favorite candy, nerd gummy clustersEPISODE CREDITS: Reported by - Latif Nasserwith help from - Jessica Yung, Maria Paz Gutierrez, Jessica Yung, Ekedi Fausther-Keeys, and Natalia RamirezProduced by - Jessica Yung with help from - Mona Madgavkar, Maria Paz Gutierrez, Gabby Santas, and Maia Appleby Melamedwith mixing help from - Jeremy BloomFact-checking by - Sophie Samieeand Edited by - Pat WaltersEPISODE CITATIONS:Videos:Youtuber Chemiolis tried to make Luguduname himself (https://zpr.io/MmUbGfwwFrFH) Articles -Race to Redesign Sugar (https://zpr.io/VpsMxfPRbxaz) by Nicola TwilleyThe Search for Sweet (https://zpr.io/JmeDkVhrd2dK) by Burkhard BilgerHow My Trip to Quit Sugar Became A Journey Into Hell (https://zpr.io/ni6xgC38Qmyf) by Caity WeverHow Much of Our Existence Do We Owe to Sugar? (https://zpr.io/M2py48SxnQAT) by Jackie Flynn MogensenScientists Find Sugar In Space (https://zpr.io/e94UtUuhPtbT) by Rebecca DzombakSign up for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Signup (https://radiolab.org/newsletter)!Radiolab is supported by listeners like you. Support Radiolab by becoming a member of The Lab (https://members.radiolab.org/) today.Follow our show on Instagram, Twitter and Facebook @radiolab, and share your thoughts with us by emailing radiolab@wnyc.org.Leadership support for Radiolab’s science programming is provided by the Simons Foundation and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.
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    31 min
  • 23 Weeks 6 Days

    23 Weeks 6 Days
    Sep 11 2026

    When Kelley Benham and her husband Tom French finally got pregnant, after many attempts and a good deal of technological help, everything was perfect. Until it wasn't. Their story raises questions that, until recently, no parent had to face… and that are still nearly impossible to answer.

    This hour, which we first released in 2013, we spend the entire episode on the story of Kelley and Tom, whose daughter was born at 23 weeks and 6 days, roughly halfway to full term. Their story contains an entire universe of questions about the lines between life and death, reflex and will, and the confusing tug of war between two basic moral touchstones: doing no harm...and doing everything in our power to help. Kelley has written about her experience in a brilliant series of articles in the Tampa Bay Times.

    If you want to know more about what we talk about in the update tacked onto the end of this episode, check out the links below:

    • This Photo Here (https://zpr.io/ZvMD42u9hzuu)
    • Plus This Video Here (https://zpr.io/8ewZUD368TzP)

    Check out the book that Tom and Kelley wrote about Juniper here:

    • Juniper: The girl who was born too soon. (https://zpr.io/8ewZUD368TzP)

    And when you're done listening to the episode, be sure to check out the video below--but be warned, it does contain spoilers.

    • 23 Weeks 6 Days Video

    EPISODE CREDITS:
    Reported by Jad Abumrad
    Produced by Matt Kielty and Jad Abumrad
    Update produced by Pat Walters and Anisa Vietze
    with mixing help from Jeremy Bloom

    Sign up for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Signup (https://radiolab.org/newsletter)!

    Radiolab is supported by listeners like you. Support Radiolab by becoming a member of The Lab (https://members.radiolab.org/) today.

    Follow our show on Instagram, Twitter and Facebook @radiolab, and share your thoughts with us by emailing radiolab@wnyc.org.

    Leadership support for Radiolab’s science programming is provided by the Simons Foundation and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.



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    1 h et 3 min
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