Science Quickly

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 [email protected] 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.

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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 [email protected] 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

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 [email protected] 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

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 [email protected] 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.

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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 [email protected] 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.

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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 [email protected] 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.

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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 [email protected] 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.

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Twenty years after Hurricane Katrina devastated New Orleans, Scientific American revisits the storm’s tragic legacy and the scientific warnings that went unheeded. Senior editor Mark Fischetti shares his experience reporting on the city’s vulnerability years before the levees broke, and our senior Earth and environment editor Andrea Thompson reflects on how hurricane preparedness has changed since.

Recommended Reading

See the Restore the Mississippi River Delta website

Drowning New Orleans

Protecting New Orleans

“They Saw It Coming,” by Mark Fischetti, in the New York Times; September 2, 2005

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 [email protected] 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

Trillions of potato-sized rocks scattered across the deep ocean floor are rich in metals such as cobalt and copper—making them a target for mining companies eager to fuel the clean-energy transition. But recent research suggests these rocks may also be supporting marine life in ways scientists are only beginning to understand. In this episode, scientist and journalist Clare Fieseler and filmmaker Jason Jaacks join host Rachel Feltman to explore the surprising science behind these deep-sea rocks and the environmental stakes of harvesting them.

Recommended Reading

A ‘Dark Oxygen’ Mystery Is Unfolding at the Ocean Bottom—But Undersea Mining Giants May Soon Move In

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 [email protected] 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 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

Science doesn’t always get it right the first time—and that’s part of the journey. In this anniversary episode, we explore how ideas about nerve damage, sustainable materials and alien life have done a full 180.

Recommended Reading

Celebrating 180 Years of Scientific American

180 Years of Standing Up for Science

How Scientists Finally Learned That Nerves Regrow

Proof That Adult Brains Make New Neurons Settles Scientific Controversy

Plastics Started as a Sustainability Solution. What Went Wrong?

The Search for Extraterrestrial Life Is a Roller Coaster of Hope and Disappointment

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.

Email us at [email protected] 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 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