Science Friday

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Covering the outer reaches of space to the tiniest microbes in our bodies, Science Friday is the source for entertaining and educational stories about science, technology, and other cool stuff.

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Are Ultramarathoners Just Built Different?

‘Tis the season for exercise resolutions. For a select few, an ultramarathon—a race of 50, 100, or even more miles—may be on the table for 2026. But is there a limit to what our bodies can endure? And what makes ultramarathoners capable of these tremendous feats? Joining Host Flora Lichtman are sports medicine expert Brandee Waite and biological anthropologist Andrew Best. Guests: Dr. Brandee Waite is the director of UC Davis Health Sports Medicine in Sacramento, California. Dr. Andrew Best is an assistant professor of biology at the Massachusetts College of Liberal Arts. Transcripts for each episode are available within 1-3 days at sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

18 min
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Your Cells Are Always Building A Whole New You

In the last year, you’ve basically replaced your body weight in new cells. So yes, it’s a new year, new you. To ring in 2026, we’re talking about starting anew, and drawing inspiration from tiny worms that embody the ultimate growth mindset—they can regrow a whole body from just a tiny piece of their tail. In this festive episode, Host Flora Lichtman talks with biologist Alejandro Sánchez Alvarado, a pioneer in the field of regeneration, about the science of regeneration and the biology lessons we can carry into the new year. Guest: Dr. Alejandro Sánchez Alvarado is a biologist and president and chief scientific officer of the Stowers Institute for Medical Research in Kansas City, Missouri. Transcripts for each episode are available within 1-3 days at sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

18 min
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A Look Back At 2025 In Science, From Federal Cuts To Space Junk

This has been a busy year in science, from government budget cuts and policy changes affecting research, to the record rise of renewables, to the surge in AI, and everything in between. Science journalists Sophie Bushwick and Maggie Koerth join Host Ira Flatow to unpack some of the year’s top stories, and some you might have missed. Guests: Sophie Bushwick is a freelance science journalist and editor based in New York. Maggie Koerth is climate and weather editor for CNN, based in Minneapolis. Transcripts for each episode are available within 1-3 days at sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

16 min
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How Death Metal Singers Make Their Extreme Vocalizations

Being able to belt out a tune like Adele or Pavarotti is not just about raw talent. The best singers in the world have to work on their technique—like how to control their breath and develop the stamina to hit note after note for a two-hour concert. But pop stars and opera singers aren’t the only vocalists who have figured out how to harness their voices for maximum impact. Death metal vocalists also train their voices to hit that unique guttural register. And those iconic screams are not as easy to master as they might seem. Vocal scientists at the University of Utah are now bringing death metal singers into the lab to try to understand how they make their extreme vocalizations. What they’re finding is not only insightful for metalheads, but might also help improve treatment for people with some types of vocal injuries. In a conversation from April, Host Flora Lichtman talks with speech pathologist Amanda Stark, and Mark Garrett, vocal coach and lead singer of the band Kardashev. Read the whole story at sciencefriday.com. Guests: Dr. Amanda Stark is a speech pathologist and vocology researcher at the University of Utah in Salt Lake City, Utah. Mark Garett is a vocal coach and the lead singer of Kardashev. He’s based in Phoenix, Arizona. Transcript available at sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

14 min
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What The Sigma Is Algospeak?

Gen Alpha slang can seem unintelligible to adults, but linguist and TikToker Adam Aleksic argues language development in the internet age is worth legitimate study. In a conversation from July, Adam talks to Host Flora Lichtman about how algorithms and social media are changing the way we speak, and discusses his new book, Algospeak: How Social Media is Transforming the Future of Language. Guest: Adam Aleksic is a linguist and content creator posting educational videos as the “Etymology Nerd” to an audience of more than three million. He is the author of Algospeak: How Social Media is Transforming the Future of Language. Transcript is available on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

19 min
26/12/2025

Tangling With Entanglement And Other Big Ideas In Physics

What have we learned in recent years about black holes? Can entangled quantum particles really communicate faster than light? What’s the story behind Schrödinger’s Cat? And, in this weird liminal space between the holidays, what even IS time, really? Physicist Sean Carroll and Host Ira Flatow tackled those big questions and more at a recent event at WNYC’s Greene Space in New York City. Carroll’s book The Biggest Ideas in the Universe: Space, Time, and Motion is the SciFri Book Club pick for December. Guest: Dr. Sean Carroll is the Homewood Professor of Natural Philosophy at Johns Hopkins University in Baltimore. Transcripts for each episode are available within 1-3 days at sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

36 min
25/12/2025

The Science Of Thriving In Winter—By Embracing It

Health psychologist Dr. Kari Leibowitz traveled to some of the coldest, darkest places on earth to learn how people there don’t just survive, but thrive in winter. She says that one of the key ingredients is adopting a positive wintertime mindset by focusing on and celebrating the good parts of winter. In a conversation from January, Flora Lichtman talks with Dr. Kari Leibowitz, author of How to Winter: Harness Your Mindset to Thrive on Cold, Dark, or Difficult Days, about saunas, cold plunges, candles, and other small ways to make winter a season to look forward to rather than dread. Plus, she responds to some of our audience’s own tips to make the season enjoyable. Guest: Dr. Kari Leibowitz is a health psychologist and author of How to Winter: Harness Your Mindset to Thrive on Cold, Dark, or Difficult Days. She’s based in Amsterdam, The Netherlands. Transcript is available at sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

18 min
24/12/2025

A Neurologist Investigates His Own Musical Hallucinations

Imagine sitting at home and then all of a sudden you hear a men’s choir belting out “The Star Spangled Banner.” You check your phone, computer, radio. Nothing’s playing. You look outside, no one’s there. That’s what happened to neurologist Bruce Dobkin after he received a cochlear implant. He set out to learn everything he could about the condition, called musical hallucinosis. In a story from August, Host Ira Flatow talks with Dobkin about his decision to publish his account in a medical journal and why the condition is more common than he realized. Guest: Dr. Bruce Dobkin is a neurologist at UCLA Health. Transcript is available at sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

11 min

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Ira Flatow

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Flora Lichtman

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Hakeem Oluseyi

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Stefanie Milam

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Angela Oliverio

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Johanna Teske

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James Vincent

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Rosemary Mosco

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Corina D. Newsome

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Tamsin Mather

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Covering the outer reaches of space to the tiniest microbes in our bodies, Science Friday is the source for entertaining and educational stories about science, technology, and other cool stuff.