The thrill of not knowing all the answers | Harini Bhat
On TED Talks Daily, scientist and storyteller Harini Bhatt describes how embracing not knowing transformed her from a self-described "wannabe know-it-all" into the creator of the YouTube channel Today I Learned Science. She shares how following her curiosity about the Teotihuacan pyramids led to her first viral video and a mission to translate rigorous scientific research into captivating stories for everyone. Through striking examples-from a brain turned to glass, to new ideas about the origins of life, to watching an embryo implant in real time-she argues that science belongs to anyone willing to stay gloriously curious and keep asking why.
Things You Thought You Knew - Force, Heat, & Speed
Neil deGrasse Tyson, joined by comedian co-host Chuck, explores three commonly confused physics pairs: force versus pressure, heat versus temperature, and speed versus acceleration. Using everyday examples like gym spotting, walking on ice, kitchen knives, tornado damage, ocean warming, air conditioners, and sports cars, he shows how precise definitions change how we understand real-world phenomena. The conversation emphasizes how these distinctions explain everything from why houses explode in tornadoes to why Teslas feel so fast and why the ocean can store vast amounts of heat.
TED Talks Daily Book Club: Human Nature: Nine Ways to Feel About Our Changing Planet | Kate Marvel
Host Elise Hu interviews climate scientist Kate Marvel about her book "Human Nature, Nine Ways to Feel About Our Changing Planet," which explores climate change through nine emotions rather than just data or policy. Marvel discusses why scientists should acknowledge their feelings, how climate communication needs storytelling as well as charts, and how humans still have agency to shape a wide range of possible futures. They cover topics including grief for changing places, the limits of individual action, practical climate solutions, technological interventions, and how hope can be understood as something we do rather than something we simply have.
Quantum Refuge
Radiolab host Lulu speaks with 28-year-old Gazan physicist Qasem Walid about how quantum physics has become both a language and an inner refuge for him while living through war, displacement, and loss in Gaza. Over months of conversations, he describes daily life under bombardment, the deaths of his professor and relatives, and his experience of feeling like Schrödinger's cat-trapped in a box where his survival is uncertain and unseen by the outside world. He uses concepts like superposition, quantum tunneling, and harmonic oscillators to make sense of his own existence and to plead for the world to "open the box" and truly look at what is happening in Gaza.
Superhero Science: StarTalk Live! With Charles Liu
In this live Special Edition of StarTalk recorded at Guild Hall in East Hampton, Neil deGrasse Tyson, comedian Chuck Nice, former soccer pro Gary O'Reilly, and astrophysicist Charles Liu explore the real physics behind superhero powers. They discuss Superman's physiology, X-ray vision, wormholes and warp drive, invisibility, quantum effects like tunneling, entanglement, and many-worlds, and how these ideas appear in comics and films. The conversation ends with reflections on quantum physics, the limits of human intuition, and why embracing unanswered questions is central to science and culture.
Short Stuff: Third Man Syndrome
Josh and Chuck discuss "third man syndrome," a phenomenon where people in extreme, often life-threatening situations report sensing a distinct, guiding presence that feels like another person with them. They explore classic accounts from Ernest Shackleton's Antarctic expedition, mountaineers like Frank Smythe and Joe Simpson, and survivors of the 9/11 attacks, then consider possible explanations ranging from an innate survival mechanism to the bicameral mind hypothesis. The conversation stays grounded in reported experiences while acknowledging that science has no definitive explanation yet.
Why your blood should flow like ketchup | Sean Farrington
Host Elise Hu introduces a TEDx talk by chemical engineer Sean Farrington about rheology, the study of how materials flow and deform, and why it matters far beyond consumer products. Farrington explains how rheology is used to control the texture and performance of everyday items like peanut butter, shampoo, and ketchup, then connects these principles to the non-Newtonian, shear-thinning behavior of blood and its link to cardiovascular disease. He argues that measuring blood's viscosity more routinely could improve early detection of heart conditions, describes his work on a portable microfluidic device to make such measurements accessible, and calls for greater awareness and collaboration between engineers, physicians, and the public.
The Glow Below
Host Molly Webster talks with deep-sea explorer and oceanographer Edie Witter about her decades studying bioluminescence in the deep ocean. Witter describes her first encounters with glowing deep-sea creatures, the many survival functions of bioluminescence, and the surprising evolutionary origin of light-producing bacteria. The conversation explores how light operates as camouflage, weapon, and communication system in the deep sea, and how interacting with bioluminescent life can profoundly affect human perception and awe.
Bill Nye Takeover
Bill Nye guest hosts StarTalk with Chuck Nice to interview space policy expert Casey Dreyer about severe proposed cuts to NASA's budget, especially its science programs. They explain what NASA science includes, why Earth observation and planetary exploration matter, how Mars Sample Return could answer the question of life beyond Earth, and how politics, international competition, and commercial space intersect with long-term scientific goals. The episode closes with concrete ways listeners can advocate for NASA science through the Planetary Society.
The surprising science of adolescent brains | Jennifer Pfeifer
Neuroscientist Jennifer Pfeiffer argues that adolescence is not a period of dysfunction but a transformative stage of growth spanning roughly ages 10 to 25. She explains how puberty, brain development, and social context shape adolescent behavior, debunks common myths about smartphones and mental health, and highlights the far greater importance of relationships and caregiver well-being. The talk calls for changing the cultural narrative about young people from doom and blame to respect, support, and shared opportunity.
The new era of AI-powered protein design | César RamÃrez-Sarmiento
Host Elise Hu introduces TED Fellow and protein engineer César RamÃrez-Sarmiento, whose lab in Santiago, Chile uses artificial intelligence to design novel proteins for environmental and therapeutic applications. In his talk and follow-up conversation with TED Fellows Program Director Lily James-Olds, César explains what proteins are, how AI has radically improved protein design success rates, and how enzymes could help address challenges like plastic pollution, mining impacts, and climate change. They also discuss the dual-use risks of AI in biodesign, emerging global regulation and leadership (including Chile and other countries), and how César's artistic background shapes his creative approach to science and public communication.
Creation Story
Host Latif Nasser interviews paleoanthropologist and evolutionary biologist Alaa Alshamahi about her journey from an ultra-conservative, creationist Muslim upbringing and teenage missionary work to becoming an evolutionary scientist. She describes studying evolution at University College London as a "double agent" intent on disproving Darwin, the specific genetic evidence that shattered her creationist worldview, and the personal cost of leaving her religious community. Alaa then connects her own experience of crossing worlds to the story of human evolution, including interbreeding with Neanderthals and Denisovans, and explains how her crisis of faith now shapes a more empathetic approach to people who reject scientific findings.
How Dolly Parton led me to an epiphany | Jad Abumrad (re-release)
Host Elise Hume introduces a TED 2020 talk by Radiolab creator Jad Abumrad, in which he reflects on his evolution as a storyteller and journalist. Abumrad describes moving from science-driven stories that end in wonder, to conflict-driven narratives centered on struggle, and finally to seeking "revelation" by holding opposing truths together. Through his podcast series about Dolly Parton and a visit to her Tennessee mountain home, he discovers unexpected connections to his Lebanese immigrant heritage and embraces a new storytelling goal he calls finding "the third"-a shared space that emerges when differences are truly recognized.
Cosmic Queries - Get Some Space
Neil deGrasse Tyson and co-host Chuck Nice field a grab bag of listener questions on topics ranging from black holes and Hawking radiation to dark matter, exoplanet life, and the structure of the observable universe. They also discuss the feasibility of colonizing other planets, the impact of military versus science funding, how solitude enabled figures like Isaac Newton to make breakthroughs, and the role of science literacy in preventing societal self-destruction.
A Tribute To The Far Side
Hosts Josh and Chuck pay tribute to Gary Larson's single-panel comic The Far Side, tracing its origins from Larson's quirky family and love of biology through his break into syndication and eventual global success. They analyze what makes the humor work, walk through several iconic panels, and explore Larson's perfectionism, his choice to end the strip before it declined, and his deep connection with the scientific community and conservation. The episode closes with a listener correction about the relationship between dolphins, orcas, and whales.
How do you rethink how the world works? An entrepreneur and an engineer answer | Yancey Strickler and Jenny Du
Host Elise Hu introduces a conversation between writer and former Kickstarter CEO Yancey Strickler and engineer-chemist Jenny Du about how feeling like an outsider can shape unconventional careers and systems-level innovations. Strickler reflects on lifelong feelings of not belonging, how that pushed him to question institutions, and how his thinking about punk labels and the Royal Society led to his artist corporation idea. Du describes how a shocking statistic about global food waste set her on a mission to extend the life of healthy foods, and together they discuss resilience, working within entrenched systems, and staying optimistic and truth-focused in a world that often feels "doomy."
The Spark of Life
Host Molly Webster speaks with applied biophysicist Narosha Murugan about the discovery that living cells emit extremely faint light tied to their metabolism, and explores how this challenges the traditional lock-and-key view of cellular signaling. They discuss possible mechanisms for how this light is generated in mitochondria and potentially guided through cellular structures, its hypothesized roles in brain function and consciousness, and how its distinct signatures can already be used experimentally to detect cancer and distinguish living from dead tissue. The conversation ends with reflections on "life flashes" at fertilization and death, and on thinking of living beings as organized patterns of energy and light.