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New discoveries, everyday mysteries, and the science behind the headlines — in just under 15 minutes. It's science for everyone, using a lot of creativity and a little humor. Join hosts Emily Kwong and Regina Barber for science on a different wavelength.

If you're hooked, try Short Wave Plus. Your subscription supports the show and unlocks a sponsor-free feed. Learn more at plus.npr.org/shortwave

Short Wave

Worldwide, populations of scavenging animals that feed on rotting carcasses are declining. Scientists are finding that this can seriously hurt human health. NPR science reporter Jonathan Lambert has been looking into how human health is intertwined with scavenging animals and why these animals’ decline could lead to more human disease. Today, he brings all he learned, including how conservation could help, to your earholes.

Check out more of Jon’s reporting on scavengers and human health.

Interested in more science behind skincare products? Email us your question at shortwave@npr.org.

Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave.

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Why Animal Scavengers Protect Your Health

How high will the ocean rise under climate change? By 2050, scientists have a pretty good idea. But why does it matter where you live? And what can humans do to slow it down? 
This episode is part of Nature Quest, our monthly segment that brings you a question from a Short Waver who is noticing a change in the world around them. Our question comes from Peter Lansdale in Santa Cruz, Calif. 

To see what future sea levels will look like where you live, check out NOAA’s Sea Level Rise Viewer here.

Noticed any changes in *your* local environment that you want us to investigate? Send a voice memo to shortwave@npr.org telling us your name, your location, and the change you’ve noticed – it could be our next Nature Quest episode!

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Nature Quest: How High Will Sea Levels Rise?

You’ve probably heard of PTSD, post-traumatic stress disorder. But what about its counterpart, post-traumatic growth?
The term was coined in the 90s to describe the positive psychological growth that researchers documented in people who had been through traumatic or highly stressful life events. Psychologists and sociologists conducting long-range studies on survivors of Hurricane Katrina – which hit 20 years ago and remains one of the most devastating natural disasters to hit the US – are continuing to learn more about it. 

So how do you measure post-traumatic growth? Can it co-exist with PTSD? NPR mental health correspondent Rhitu Chatterjee explains what scientists have found so far … and how it could help shape disaster relief efforts in the future.

Interested in more psychology and social science stories? Email us your question at shortwave@npr.org.

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Why Do Some Hurricane Survivors Thrive After Disaster?

Since the age of nine or ten, Katie Burns has had debilitating pain from endometriosis, a condition where tissue resembling the uterine lining grows outside the uterus. For years, Katie was in the dark about what was causing her pain. Even after a diagnosis at age 20 it was hard to find relief, or even answers about her condition. Her search for better care is part of what led her to a career studying the disease, which affects tens of millions of people worldwide. And in 2012, she discovered something new about its origins. Today, we talk to Katie and science reporter Meredith Wadman about that discovery, which points to a surprising culprit of endometriosis — the immune system.

Read Meredith’s full piece in Science Magazine HERE. 

Interested in more health science ? Email us your question at shortwave@npr.org.

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A Surprising Cause Of Endometriosis Could Lead To Cure

On Monday, the Trump administration linked the use of Tylenol with rising autism rates, but science doesn’t support that claim. Guest host Sydney Lupkin talks to autism researcher Helen Tager-Flusberg about how autism is studied, the findings from decades of research, and what people–especially those who are pregnant–should do when they experience pain or fever. Plus, we dig into guidance behind using leucovorin to treat autism.

Interested in more science behind the headlines? Email us your question at shortwave@npr.org.

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Tylenol and Autism: What’s True and What Isn’t

Food allergies have risen in the United States over the last few decades. Research suggests that 40 years ago the prevalence of food allergies was less than 1%. But today that number is closer to 6%. But this trend is not present in all countries — and what people are allergic to varies globally. Today, we dive into the complex world of food allergies with Dr. Waheeda Samady. She's the director of clinical research at Northwestern University's Center for Food Allergy and Asthma Research.

Have a food science question? Email us at shortwave@npr.org.

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A Surprising Culprit of Food Allergies

The anti-aging product market was worth roughly 53 BILLION dollars in 2024. One of the latest big trends: red light therapy. Social media is rampant with claims about all sorts of purported health benefits to using directed red light regularly … but does the research really live up to all the hype?

For answers, we turn to cosmetic chemist and science communicator Michelle Wong. Together, she and host Regina G. Barber sift through the thin (albeit growing) research on red light therapy to find out which claims are clearly backed by the literature – and which still need a bit more experimental data. 

Interested in more science behind skincare products? Email us your question at shortwave@npr.org.

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Should You Try Red-Light Therapy?

Octopuses and their arms are a bit of a mystery. Not because scientists don’t know how they work; they’re boneless hydrostats, made up of groups of muscles working together and capable of bending, twisting, elongating or shortening — like a frog’s tongue, or an elephant’s trunk. But because scientists are still figuring out how most octopuses use those arms in the wild. 

Scientists at the Marine Biological Laboratory in Woods Hole and the marine lab at Florida Atlantic University wanted to answer that question. By analyzing videos taken in the wild, they found that octopuses seemed to prefer doing certain tasks with certain arms… and that the majority of the time, they used their front arms to explore and their back arms to get around. Researchers on the project hope that furthering our understanding of octopus behavior and movement will be useful for developing things like soft robotics.

Interested in more science discoveries? Email us your question at shortwave@npr.org.

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Untangling The Science of Octopus Arms

For centuries, the primary way that astronomers studied outer space was through sight. But just ten years ago, scientists successfully established a way to ‘listen’ to our cosmos – detecting gravitational waves created by huge cosmic events that took place billions of light years away. NPR science correspondent Nell Greenfieldboyce explains how scientists detect those gravitational waves, what kind of cosmic events we’re detecting now, and what they could tell us about our universe.
Interested in more stories about the cosmos? Email us your question at shortwave@npr.org.Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave.

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What Does a Black Hole Collision Sound Like?

Parkinson’s Disease affects around a million people in the United States. And that number is on the rise, in part because our population is getting older. 

Dr. Claire Henchcliffe, chair of neurology at the University of California, Irvine, is one of the scientists at the forefront of Parkinson’s research. She's working toward new treatment options for Parkinson’s, including recent discoveries about the potential use of stem cells. 

Science correspondent Jon Hamilton dives into this research — and even a future where scientists can prevent the disease altogether — on the show with Henchcliffe. 

Interested in more on the future of brain science? Email us your question at shortwave@npr.org – we may feature it in an upcoming episode!

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What Do Stem Cells Mean For The Future Of Parkinson's?

We meet two scientists working on opposite sides of the world, both thinking creatively about rising sea levels and our changing oceans. Andrea Dutton, a geologist at the University of Wisconsin-Madison, and Stacy Jupiter, a marine biologist and Melanesia Director with the Wildlife Conservation Society, were awarded MacArthur Fellowships this fall.

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Meet Two MacArthur 'Genius Grant' Scientists

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