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Scientific American

Host Rachel Feltman, alongside leading science and tech journalists, dives into the rich world of scientific discovery in this bite-size science variety show.

Science, Quickly

In this episode of Science Quickly, host Rachel Feltman explores the age-old quest to replace failing human body parts with science writer Mary Roach. From ancient surgery to modern medical marvels, Roach shares insights from her new book Replaceable You, revealing why replicating our original anatomy is still one of medicine’s greatest challenges.

Recommended Reading

Replaceable You: Adventures in Human Anatomy, by Mary Roach. W. W. Norton, 2025

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi and Jeff DelViscio. This episode was edited by Jeff DelViscio. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.
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Mary Roach on the Science of Swapping Human Parts

The Centers for Disease Control and Prevention’s vaccine advisory committee has been reshaped, with new recommendations on the horizon. Meanwhile studies reveal subtle brain changes in contact sports players and highlight ongoing risks of repetitive head injuries. Climate change is linked to a surge in heat-related deaths across Europe, while surprising research uncovers chimpanzees’ daily ethanol consumption and ants that produce hybrid offspring.

Recommended Reading

Here’s What Happened at RFK, Jr.’s Overhauled Vaccine Panel Meeting

How RFK, Jr.’s Dismissal of CDC Immunization Committee Panelists Will Affect America’s Vaccine Access

Chronic Traumatic Encephalopathy: A Player's Perspective

Email us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new everyday: subscribe to Scientific American and sign up for our daily newsletter. 
Learn more about your ad choices. Visit megaphone.fm/adchoices

Vaccine Shakeups, Brain Injury Warnings and Boozy Chimps

From viral slang such as “skibidi” to the rise of so-called brain rot, linguist and content creator Adam Aleksic, aka the “Etymology Nerd,” and associate editor Allison Parshall, who covers the mind and brain, unpack how social media and algorithms are reshaping the way we communicate.

Recommended Reading

The Internet Is Making Us Fluent in Algospeak

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.

This episode was made possible by the support of Yakult and produced independently by Scientific American’s board of editors.
Learn more about your ad choices. Visit megaphone.fm/adchoices

Algorithmic Social Media Is Driving New Slang

Scientists are tuning in to a surprising conversation happening inside us—between our gut and our brain. Host Rachel Feltman chats with Maya Kaelberer, an assistant professor at the University of Arizona’s department of physiology, to explore how intestinal cells and microbiomes might be shaping our moods, cravings and mental health in ways we’re only beginning to understand.

Recommended Reading

“A Gut Sense for a Microbial Pattern Regulates Feeding,” by Winston W. Liu et al., in Nature. Published online July 23, 2025

Website for the Gut Brain Laboratory at the University of Arizona

The gut-brain community website Gastronauts

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.

This episode was made possible by the support of Yakult and produced independently by Scientific American’s board of editors.
Learn more about your ad choices. Visit megaphone.fm/adchoices

The Role Our Microbiome Plays In Our ‘Gut Feelings’

A paper published by the Centers for Disease Control and Prevention argues that Chagas disease is now endemic in the U.S. Koalas may finally be spared from a deadly epidemic. Meanwhile NASA’s Perseverance Mars rover has uncovered tantalizing clues about potential ancient microbial life on the Red Planet. Hear about all that and more in this week’s news roundup.

Recommended Reading

Treating Koala STDs May also Quash Their Essential Gut Microbes

New Black Hole Measurements Show More Ways Stephen Hawking and Albert Einstein Were Right

This Rock May Hold Proof of Life on Mars

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.

This episode was made possible by the support of Yakult and produced independently by Scientific American’s board of editors.

Learn more about your ad choices. Visit megaphone.fm/adchoices

Kissing Bugs, Koalas and Clues to Life on Mars

Human brains don’t just perceive reality—they invent it. In this episode of Science Quickly, cognitive neuroscientist Daniel Yon speaks with host Rachel Feltman about how perception is an active process of prediction in which the brain constructs theories about the world that can sometimes lead us astray. Drawing from his book A Trick of the Mind, he reveals why this “hallucination” of reality is not a flaw but a fundamental feature of how we navigate the world.

Recommended Reading

A Trick of the Mind. Daniel Yon. Grand Central Publishing, 2025 

The Neuroscience of Reality

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.
Learn more about your ad choices. Visit megaphone.fm/adchoices

Unpacking the Brain’s Role in Inventing Your Perception

A tick bite can trigger a rare allergy to red meat and animal products, forcing major lifestyle changes. Scientist Lee Haines joins host Rachel Feltman to break down what causes alpha-gal syndrome, why it’s spreading and how to spot the signs.

Recommended Reading

Red Meat Allergy Caused by Tick Bite Is Spreading—And Nearly Half of Doctors Don’t Know about It

This Tick Can Make You Allergic to Meat, and It’s Spreading

“A Red Meat Allergy from Tick Bites Is Spreading—And the Lone Star Tick Isn’t the Only Alpha-Gal Carrier to Worry About,” by Lee Rafuse Haines, in the Conversation. Published online August 5, 2025

Haines’s profile at the Conversation

Haines’s profile at the University of Notre Dame’s Office of Media Relations

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.
Learn more about your ad choices. Visit megaphone.fm/adchoices

How a Tick Bite Can Make You Allergic to Meat

This week’s roundup dives into Mars’s lumpy mantle, a nasal spray that may help prevent COVID and the growing confusion around vaccine access in the U.S. Plus, researchers link phone use while on the toilet to hemorrhoid risk, uncover ancient mammoth microbiomes and explain why squirrels’ thumbnails matter more than you think.

Recommended Reading

Can You Get a COVID Vaccine This Year? Here’s What We Know

Experts Warn of Growing Threats amid CDC Resignations

New Nasal Vaccines Offer Better Protection from COVID and Flu—No Needle Needed

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.
Learn more about your ad choices. Visit megaphone.fm/adchoices

Marsquakes, Vaccine Politics and Mammoth Microbiomes

In this episode of Science Quickly, host Rachel Feltman is joined by associate editor for health and medicine Lauren J. Young to unpack the growing unrest at the Centers for Disease Control and Prevention following the departure of the agency’s director Susan Monarez. As criticism mounts against Secretary of Health and Human Services Robert F. Kennedy, Jr.—including a scathing essay from nine former CDC leaders and a resignation demand from more than 1,000 past and current HHS staffers—the episode explores what these developments mean for the future of public health leadership in the U.S.

Recommended Reading

CDC’s Leadership Is in Chaos—Experts Warn of Public Health Risks

“Kennedy Is Endangering Every American’s Health,” by Richard Besser et al., in New York Times; September 3, 2025

“HHS Employees Demand RFK Jr. Resign for ‘Compromising the Health of This Nation,’” by Meg Tirrell, in CNN Health. Published online September 3, 2025

Join the #SciAmInTheWild photography challenge for a chance to win a one-year Unlimited subscription to Scientific American—plus an exclusive bundle of gadgets and gear to level up your next adventure. See the rules for entry here.

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.
Learn more about your ad choices. Visit megaphone.fm/adchoices

Inside the Turmoil at the CDC

Meteorologists have made big strides in predicting hurricane paths, but many people still misinterpret the forecast maps. In this episode, senior news editor for sustainability Andrea Thompson joins host Rachel Feltman to unpack what those maps actually show—and why staying informed as a storm evolves is more important than ever.

Recommended Reading

How to Decode a Hurricane Forecast

Join the #SciAmInTheWild photography challenge for a chance to win a one-year Unlimited subscription to Scientific American—plus an exclusive bundle of gadgets and gear to level up your next adventure. See the rules for entry here.

E-mail us at sciencequickly@sciam.com if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith.
Learn more about your ad choices. Visit megaphone.fm/adchoices

Hurricane Forecasting 101

Here are some “highlights” from the past 13.5 years of this podcast.
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Our 3,000th Episode

Lyt når som helst, hvor som helst

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