This week: the story of astrophysicist Charity Woodrum. Charity is an extragalactic astronomer who studies the life and death of galaxies, why some galaxies burn bright and others dim and sputter out. And in the midst of an unthinkable grief in her personal life, she discovers something in the sky – a new kind of light that would guide her path forward. Special thanks to Megan Stielstra, Jad Abumrad, Michael Woodrum, Gina Vivona, and Clair Reilly-Roe. EPISODE CREDITS: Reported by - Lulu MillerProduced by - Jessica YungFact-checking by - Diane Kelly Radiolab | Lateral uts:Our episode The Darkest Dark (https://radiolab.org/podcast/the-darkest-dark) could be of interest to those seeking the deepest unknowns. EPISODE CITATIONS:Music -Clair Reilly-Roe’s song “Sky Full of Ghosts” (https://zpr.io/JgauhRnj7qpX) Articles -A new documentary on Charity Woodrum’s story: Space, Hope and Charity (https://www.spacehopecharityfilm.com/) Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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.

This week, two conversations from the archives about parts of the world that are imperceptible to us, verging on almost unthinkable. We start with a moment of uncertainty in physics. Inspired by an essay written by physicist and novelist Alan Lightman, called The Accidental Universe (https://zpr.io/4965dUdNqtpQ), taken from a book of the same name. Former Radiolab co-host Robert Krulwich pays a visit to Brian Greene to ask if the latest developments in theoretical physics spell a crisis for science. He finds that we've reached the limit of what we can see and test, and we’re left with mathematical equations that can't be verified by experiments or observation. Then, come along as we kick rocks. And end up tumbling down a philosophical rabbit hole where the solid things around us might not be solid at all. We talk to Jim Holt, author of Why Does the World Exist? (https://zpr.io/UqHpLnDx2QNx) who points out that when you start slicing and sleuthing in subatomic particle land, trying to get to the bottom of what makes matter, you mostly find empty space. Your hand, your chair, the floor, it's all made up of mostly nothing. Robert and Jim go toe-to-toe over whether the universe is made up of solid bits and pieces of stuff, or a cloudy foundation that more closely resembles thoughts and ideas. Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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.

Back in 2017 our colleagues at More Perfect gathered a room full of people together to debate a straight forward question: Can free speech go too far? Today, eight years have passed and plenty has changed, but this question feels alive as ever. And so we’re re-airing More Perfect’s The Hate Debate. Taped live at WNYC's Jerome L. Greene Performance Space, Elie Mystal, Ken White and Corynne McSherry duke it out over whether the first amendment needs an update in our digital world. Special thanks to Elaine Chen, Jennifer Keeney Sendrow, and the entire Greene Space team. Additional engineering for this episode by Chase Culpon, Louis Mitchell, and Alex Overington. EPISODE CITATIONS: Videos - If watching is more your speed, you can see the event, in its entirety, here: https://www.youtube.com/live/azcIcVDyVTM?si=ZqpQHQfvTKr2jS0z There’s other Radiolabs for that - Further recommended listening What Up Holmes and Post No Evil. Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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.

This hour of Radiolab, former co-hosts Jad and Robert set out in search of order and balance in the world around us, and ask how symmetry shapes our very existence -- from the origins of the universe, to what we see when we look in the mirror. Along the way, we look for love in ancient Greece, head to modern-day Princeton to peer inside our brains, and turn up an unlikely headline from the Oval Office circa 1979. EPISODE CITATIONS: Videos - Back in the day, when we first aired this episode, the film collective Everynone, filmmakers Will Hoffman, Daniel Mercadante and Julius Metoyer III were inspired with our yearning for balance, and aimed to visually reveal how beautiful imperfect matches can be.Radiolab Presents: Symmetry (https://youtu.be/zEQskIsHKT8) Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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/X 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.

Have you heard On the Media’s Peabody-winning series The Divided Dial? It’s awesome and you should, and now you will. In this episode they tell the story of shortwave radio: the way-less-listened to but way-farther-reaching cousin of AM and FM radio. The medium was once heralded as a utopian, international, and instantaneous mass communication tool — a sort of internet-before-the-internet. But, like the internet, many people quickly saw the power of this new technology and found ways to harness it. State leaders turned it into a propaganda machine, weaponizing the airwaves to try and shape politics around the world. And as shortwave continued to evolve, like the internet, it became fragmented, easily accessible, and right-wing extremists, conspiracy theorists and cult leaders found homes on the different shortwave frequencies. And even today - again, like the internet - people with money are looking to buy up this mass-communication tool in the hopes of … making more money. This is episode one from the second season of The Divided Dial a limited series from On The Media. Listen on Spotify (https://zpr.io/hKCcFEGTLb5a) Listen on Apple Podcasts (https://zpr.io/tQ86YmEmiivR) Listen on the WNYC App (iTunes, Android) Listen to the full Divided Dial series (https://www.onthemedia.org/dial) Follow On The Media on Instagram @onthemedia The Divided Dial was supported in part by a grant from the Fund for Investigative Journalism. On the Media is supported by listeners like you. Support OTM by donating today (https://pledge.wnyc.org/support/otm). Follow our show on Instagram, Twitter and Facebook @onthemedia, and share your thoughts with us by emailing onthemedia@wnyc.org. Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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.

Jilted lovers and disrupted duck hunts provide a very odd look into the soul of the US Constitution. What does a betrayed lover’s revenge have to do with an international chemical weapons treaty? More than you’d think. From poison and duck hunts to our feuding fathers, we step into a very odd tug of war between local and federal law. When Carol Anne Bond found out her husband had impregnated her best friend, she took revenge. Carol's particular flavor of revenge led to a US Supreme Court case that puts into question a part of the US treaty power. Producer Kelsey Padgett drags Jad and Robert into Carol's poisonous web, which starts them on a journey from the birth of the US Constitution, to a duck hunt in 1918, and back to the present day. It’s all about an ongoing argument that might actually be the very heart and soul of our system of government. Special thanks to Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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.

This is episode five of Swimming with Shadows: A Radiolab Week of Sharks.Today, the strange, squirmy magic behind how sharks make more sharks. Drills. Drama. Death. Even a coliseum of baby sharks duking it out inside mom’s womb. And a man on a small island in the Mediterranean trying, against all odds, to give baby sharks a chance in a little plastic aquarium in his living room. Can a human raise a shark? And if so, what good is that for sharks? And for us? Doo doo doo doo doo doo.Special thanks to Jaime Penadés Suay and la Fundación Azul Marino.EPISODE CREDITS: Reported by - Rachael CusickProduced by - Rachael Cusickwith mixing help from - Jeremy BloomFact-checking by - Diane Kellyand Edited by  - Pat WaltersEPISODE CITATIONS:Articles - Claudia’s original reporting that inspired the episodeSignup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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 Gordon and Betty Moore Foundation, Science Sandbox, a Simons Foundation Initiative, and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.

This is episode four of Swimming with Shadows: A Radiolab Week of Sharks. Alison Kock was working at a car wash in Cape Town when she made a discovery that completely changed the course of her life. Inside a customer’s trunk, she found photographs of white sharks flying so high above the water they looked like airplanes. She followed those photographs to False Bay, “the Great White Capital of the World.” These sharks, in this place, are the apex of apex predators. Or they were. Until they mysteriously began to disappear. Special thanks to Kathryn Ayres. EPISODE CREDITS: Reported by - Rachael Cusick Produced by - Simon Adler and Maria Paz Gutierrezwith help from - Rebecca Laks Original music from - Simon Adler and Maria Paz GutierrezSound design contributed by - Jeremy Bloom with mixing help from - Jeremy BloomFact-checking by - Diane A. Kellyand Edited by  - Pat WaltersSignup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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 Gordon and Betty Moore Foundation, Science Sandbox, a Simons Foundation Initiative, and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.

This is episode three of Swimming with Shadows: A Radiolab Week of Sharks. Today, we take a trip across the world, from the south coast of Australia to … Wisconsin. Here, scientists are scouring shark blood to find one of nature’s hidden keys, a molecular superhero that might unlock our ability to cure cancer: shark antibodies. They’re small. They’re flexible. And they can fit into nooks and crannies on tumors that our antibodies can’t. We journey back 500 million years to the moment sharks got these special powers and head to the underground labs transforming these monsters into healers. Can these animals we fear so much actually save us? Special thanks to Mike Criscitiello, David Schatz, Mary Rose Madden, Ryan Ogilvie, Margot Wohl, Sofi LaLonde, and Isabelle Bérubé.EPISODE CREDITS: Reported by - Becca BresslerProduced by - Becca Bressler and Matt KieltyOriginal music from - Matt Kielty and Jeremy BloomSound design contributed by - Matt Kielty, Jeremy Bloom, and Becca Bresslerwith mixing help from - Jeremy BloomFact-checking by - Diane Kellyand Edited by  - Pat Walters Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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 Gordon and Betty Moore Foundation, Science Sandbox, a Simons Foundation Initiative, and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.

This is episode two of Swimming with Shadows: A Radiolab Week of Sharks. Jaws spawned a thousand imitators: sharks in tornados, sharks in avalanches, sharks that battle giant octopuses. Hollywood has officially turned sharks into monsters of every shape and size. And yet, somehow, there will always be more. But drop below the surface, into the cold, quiet blue, and another creature appears. One that has survived mass extinctions, outlasted ancient predators and pre-dates Mount Everest, the existence of trees, even the rings of Saturn. A shark that is somehow even more remarkable than sharks in tornadoes. Today, we go visit that shark. Special thanks to Andrew Fox, the entire team at Rodney Fox Shark Expeditions, John Long whose book The Secret History of Sharks inspired our obsession with sharks, and Greg Skomal, whose wonderful new book on his life studying white sharks is Chasing Shadows: My Life Tracking the Great White Shark.EPISODE CREDITS: Reported by - Rachael Cusickwith help from - Pat WaltersProduced by - Rachael Cusick and Simon Adlerwith help from - Pat WaltersSound design contributed by - Jeremy Bloomwith mixing help from - Jeremy BloomFact-checking by - Natalie Middletonand Edited by  - Pat Walters EPISODE CITATIONS:Videos - Loved learning about all the different kinds of sharks there are? Check out even more Jaida Elcock’s videos on sharks. Book - The Secret History of Sharks by John Long Chasing Shadows: My Life Tracking the Great White Shark by Greg Skomal Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (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.