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Twice-a-week series

14/11/2025

Memories Change. But Can We Change Them On Purpose?

Our memories make us who we are—just ask Barbra Streisand. But despite the lyrics in many popular songs, memories aren’t frozen in time. When we call them up, the details shift and change. And neuroscience research shows that we might be able to take that a step further—to manipulate our memories and even implant false ones. Neuroscientist Steve Ramirez joins Host Ira Flatow to explain how memory manipulation could revolutionize the way we treat brain disorders. They also discuss Ramirez’s book, How to Change a Memory: One Neuroscientist's Quest to Alter the Past, and how the sudden death of his friend and scientific collaborator made him rethink the role of memory. Guest: Dr. Steve Ramirez is an associate professor of psychology and brain sciences at Boston University and the author of How to Change a Memory. 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.

14/11/2025

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19 min
06/06/2025

Are We Prepared To Fight ‘The New Polio’?

A mysterious disease called acute flaccid myelitis (AFM) has been appearing in emergency rooms for about a decade. The disease has caused otherwise healthy children to lose the ability to move their arms and legs, and some become completely paralyzed. AFM is caused by a virus that's a cousin of the polio virus, earning it the nickname "the new polio.” Journalist and physician Eli Cahan joins Host Flora Lichtman to explain what doctors have been observing, the research efforts toward developing a vaccine, and what this emerging disease reveals about our readiness for future outbreaks and pandemics. Read Cahan’s article about what fighting this “new polio” might look like as our healthcare infrastructure gets dismantled. And, learning more about some non-cancerous cells may help researchers better understand how cancer progresses. When you think about how cancer spreads in the body, you’re probably thinking about cancer cells—they divide uncontrollably, form into tumors, and hide from the immune system. So, it makes sense that studying the behavior of these cells is critical to our understanding of cancer. But now, researchers are looking more closely at the non-cancerous cells that co-exist within tumors and the surrounding tissues. They make up what’s called the “colocateome.” Taking this more holistic approach to cancer research may help explain why some treatments don't work for all patients, and eventually may lead to more effective therapies. To better understand this expanding field, Host Ira Flatow talks with Sylvia Plevritis, a Stanford University cancer researcher. Correction: In the second story of this episode, with Dr. Sylvia Plevritis, we misspoke and said, “Some of the hardest to treat tumors are actually non-cancer cells.” This was in reference to tumors that are mostly non-cancer cells, not entirely non-cancer cells. Guests: Dr. Eli Cahan is a journalist and physician based in Boston, Massachusetts. Dr. Sylvia Plevritis is a professor of biomedical data science and radiology at Stanford University. 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.

06/06/2025

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25 min
27/12/2024

Health, Astronomy, And Climate Experts On 2024’s Coolest Science

It’s been an exciting and hectic year in science discovery and innovation. We’ve reported on stories from across many fields of science—from city climate plans and panda conservation to AI energy consumption and the spread of bird flu. Earlier this month, Ira sat down in front of a live audience at The Greene Space in New York City with Drs. Céline Gounder, Jackie Faherty, and Kevin Reed, three researchers from different areas of science. Together, they reflected on the most exciting discoveries in their fields, important stories you might have missed, and what they're looking forward to in 2025. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

27/12/2024

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49 min
19/05/2025

The Leap: The Volcano Whisperer

As a teenager living in St. Vincent, Richie Robertson saw first-hand what a volcanic eruption did to life on the island. Forty years later, he was the scientist the community turned to when the same volcano roared back to life. Richie’s colleague, Stacey Edwards of the UWI Seismic Research Centre, explains how Richie earned the trust of the community, and why it was important to have a Vincentian leading the way in a crisis. Guests: Dr. Richard Robertson, geologist at the UWI Seismic Research Centre Stacey Edwards, education & outreach manager at the UWI Seismic Research Centre “The Leap” is a 10-episode audio series that profiles scientists willing to take big risks to push the boundaries of discovery. It premieres on Science Friday’s podcast feed every Monday until July 21. “The Leap” is a production of the Hypothesis Fund, brought to you in partnership with Science Friday. Transcript will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

19/05/2025

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28 min
28/03/2025

23andMe Bankruptcy | A Coating That Can Slow A Golf Ball’s Roll

The company has genetic data of 15 million people, which could be shared with a future buyer. Here’s how to delete it. Plus, an experimental coating could make golf balls roll more reliably on greens with different conditions. After 23andMe Bankruptcy, Customers Urged To Delete Their DataIf you’re one of roughly 15 million people who used 23andMe to unlock information from their DNA, consumer advocates have a message for you: Delete your data. On Sunday, the company, which has customers send saliva samples for DNA analysis, filed for bankruptcy. While many customers submitted their saliva for the purpose of ancestral analysis, 85% of customers also consent to their data used for genetic disease research. As the company searches for a buyer, consumer advocates, including California Attorney General Rob Bonta, have urged customers to delete their data from 23andMe’s website. 23andMe and other genetic testing companies are not subject to HIPAA, meaning health and medical records kept by 23andMe could be shared with a future buyer. Producer Kathleen Davis joins Host Flora Lichtman to discuss this and other top science stories of the week. Chemists Make A Coating That Can Slow A Golf Ball’s RollWith spring here, the days are getting warmer and longer, meaning conditions are perfect for a trip to the golf course. And while golf is certainly a game of physics—force, angles, parabolas—this week researchers presented work showing that chemistry could play an important role on the golf course as well. Speaking at the meeting of the American Chemical Society in San Diego, researchers described a high performance coating that could be incorporated into the polyurethane shell of a golf ball. The hydrophilic (water-loving) coating would make tiny bits of water stick to the surface of the golf ball and sheet off, modifying the way the ball interacts with the grass of the green. That interaction, says Tom Kennedy, owner of Chemical Innovative Solutions Inc., would lead to the ball rolling more slowly and reliably, especially on “fast,” closely-cut greens in dry and windy conditions. Kennedy joins Host Ira Flatow to discuss the technology, and how hydrophilic coatings could find a home in other applications, including solar cells. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

28/03/2025

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24 min
01/04/2025

TikTok Is Shaping How We Think About ADHD

Mental health information on social media can be both revelatory and misleading. How do clinicians and their patients make sense of it? TikTok and other social media sites are full of mental health content—often short, grabby, first-person videos detailing symptoms for conditions like ADHD and autism. But what does this mean for teens and young adults who spend hours a day scrolling? A new study published in PLOS One analyzes the 100 most viewed TikTok videos about ADHD to assess both how accurate they are and how young people respond to them. Researchers found that about half of the videos were inaccurate or missing key context, and that the more TikToks young adults watched, the less critical they were of the content. For some, watching social videos about mental health conditions led them to better understand themselves and eventually get a proper diagnosis and treatment. For others it made them consider if they have conditions they don’t meet the diagnostic criteria for. Host Flora Lichtman talks with the lead author of the ADHD TikTok study, Vasileia Karasavva, a PhD Student in clinical psychology at the University of British Columbia; and Dr. Jennifer Katzenstein, director of psychology, neuropsychology, and social work at Johns Hopkins All Children’s Hospital in St. Petersburg, Florida. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

01/04/2025

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18 min
20/08/2025

Decoding Fireflies’ Smelly Signals And Blinking Butts

Fireflies’ magical blinking lights are tiny beacons in the warm dark night. Who can resist catching one? Not scientists. Because their light comes from bodily chemicals, fireflies’ power of illumination has long been used as a tool in medical research. And that has driven scientists to investigate the inner workings of the blinking beetle itself. Researchers have recently discovered that fireflies’ glowing lanterns are only one of the ways they communicate. Host Ira Flatow talks with entomologist Sarah Lower and biochemist Stephen Miller about the latest advances in firefly science. Guests: Dr. Sarah Lower is an associate professor of biology at Bucknell University where she studies fireflies. Dr. Stephen Miller is a professor of biochemistry and molecular biotechnology at the UMass Chan Medical School. 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.

20/08/2025

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18 min
09/06/2025

The Leap: A Scientist’s Quest To See Every Organism On Earth

Manu Prakash is many things—biologist, engineer, inventor, philosopher—but what he isn’t is conventional. Following his instincts has led Manu to his most ambitious project yet: mapping the whole tree of life, with the help of everyone on this planet. Step one: make a cheap microscope anyone can use. Foldscope co-inventor Jim Cybulski describes their invention, and their dream to supply millions of microscopes to the masses. Manu has been recognized by the Hypothesis Fund as a Scout for his bold science and enabling others to pursue their big ideas. “The Leap” is a 10-episode audio series that profiles scientists willing to take big risks to push the boundaries of discovery. It premieres on Science Friday’s podcast feed every Monday until July 21. “The Leap” is a production of the Hypothesis Fund, brought to you in partnership with Science Friday. 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.

09/06/2025

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26 min
08/08/2025

Lithium May Have A Role In Causing—And Treating—Alzheimer’s

The mechanisms behind Alzheimer’s disease have eluded scientists for decades. But a new breakthrough points to lithium as a possible explanation—not only does it occur naturally in the brain, but a deficiency causes dementia in mice. This research is one of thousands of projects that have lost funding due to President Trump’s cuts to the National Institutes of Health (NIH). Host Ira Flatow speaks with Alzheimer’s researcher Bruce Yankner about this new finding, and then to epidemiologist Katelyn Jetelina and immunologist Elisabeth Marnik about the country’s “quiet engine of science,” the NIH. Guests: Dr. Bruce Yankner is professor of genetics and neurology at Harvard Medical School in Boston, Massachusetts. Dr. Katelyn Jetelina, epidemiologist and author of the Your Local Epidemiologist newsletter. She’s based in San Diego. Dr. Elisabeth Marnik is an immunologist and Director of Science Education & Outreach at the MDI Biological Laboratory in Bar Harbor, Maine. 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.

08/08/2025

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27 min
24/10/2025

A Lab-Grown Salmon Taste Test And More Foodie Innovations

After years of development, lab-grown fish is taste-test ready for the public. Four restaurants in the US are serving up cultivated salmon made by the company Wildtype. Producer Kathleen Davis gives Host Flora Lichtman a rundown on how Wildtype tastes, initial public perception, and the upstream battle to take cultivated meat mainstream. Plus, SciFri heads to Burlington, Vermont, where scientists are cooking up the foods of the future—including the building blocks of cell-cultured meat. Flora digs in with foodie researchers Alexis Yamashita and Rachael Floreani about why innovation is critical to a sustainable food future. Guests: Adam Tortosa is a chef and the owner of Robin in San Francisco, California. Alexis Yamashita is a community organizer and PhD student in food systems at the University of Vermont. Dr. Rachael Floreani is a professor of mechanical engineering at the University of Vermont. 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.

24/10/2025

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30 min

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