Short Wave (NPR)

When's the last time you were in a place that was quiet — really quiet? No roadway noise, construction work or even the hum of a refrigerator. Our world is full of sounds, some of which are harming our health. The World Health Organization says "noise is an underestimated threat." Today, host Emily Kwong talks to health reporter Joanne Silberner about those health costs, what is too loud and some of the history of legislation to limit noise pollution in the United States.

Read Joanne's full article in Undark Magazine here.

Curious about other health stories? Email us at shortwave@npr.org.

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People are likely to be confused by common climate change terms like "mitigation" and "carbon neutral," according to a recent study. So how can everyone do a better job talking about climate change so that no one's left confused? NPR climate correspondent Rebecca Hersher tells us the key turns out to be pretty simple.

Read more of Rebecca's reporting on climate jargon: https://n.pr/2XdfYOC
Read the study: https://bit.ly/3Adj8QT

You can always reach the show by emailing shortwave@npr.org — but please, hold the jargon.

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That's right — Day 2 of Short Wave's Favorite Episodes Week is pure math goodness! This encore episode, we revisit a conversation with mathematician Ranthony Edmonds. She reminds us that the idea of a lone genius scribbling away and solving complex equations is nothing more than a myth — one she actively tries to dispel in her classroom at The Ohio State University. Instead, Ranthony focuses on the community aspects of math: the support systems behind each mathematician and the benefits of a collaborative, inclusive environment for math innovation.

Think we should consider math more? Let us know by emailing shortwave@npr.org.

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Accurate weather forecasting can be a matter of life or death. So countries with less money like Mozambique face a big challenge. They can't build and maintain their own weather radar or satellites. Instead, they rely on weather maps created by wealthier countries, like the U.S. NPR climate reporter Becky Hersher tells us what that means for Mozambique, a country where the weather's gotten worse as the climate changes. Reach the show by emailing shortwave@npr.org.

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If you're not so fond of spiders, you may find kindred spirits in other spiders! Researcher Daniela Roessler worked with jumping spiders and found that they know to get away from the presence of other possible predator spiders, even if they've never encountered them before. She talks with host Maria Godoy about her research and what Halloween decorations do to the poor spiders, if arachnids can have arachnophobia.

Read Daniela's research and watch a video of the experiment: https://doi.org/10.1111/1365-2435.13953

The video is also on her Twitter feed: https://twitter.com/RoesslerDaniela.

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SpaceX's Starship rocket took off again Tuesday for its sixth test flight. Crowds, including President-elect Donald Trump, gathered at the launch site in Texas to watch it fly part way around the world to the Indian Ocean.

Starship – the largest rocket ever built – is the dream of Elon Musk, who hopes to make humans a multiplanetary species. But building the rocket is having a real impact on Earth. The launch site is located in the middle of one of Texas' largest wildlife sanctuaries and environmentalists say every launch is causing damage.

Plus, how government regulation of launches may change in a second Trump administration.

Want to hear more on the future of space exploration? Email us your ideas to shortwave@npr.org — we'd love to hear from you!

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Sunscreen: we should all be using it, but we might not all be using it the right way. In fact, the type of sunscreen you use may not be nearly as important as using it effectively. With the help of a few expert dermatologists, NPR science correspondent Allison Aubrey cues Scientist in Residence Regina G. Barber into six common mistakes to avoid when using sunscreen and how to stay safe in the sun this summer.

Have a science fact you can't stop thinking about? Email us at shortwave@npr.org! We'd love to hear from you.

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Parkinson's disease is a brain disorder that leads to difficulty with walking, balance and coordination. There is currently no cure, but scientists in Pittsburgh, PA have an ambitious plan to develop a treatment based on the placebo effect. NPR science correspondent, Jon Hamilton, tells the story of how this plan came to be. It involves a batch of illegal drugs, the rabies virus, and figuring out what makes a monkey really happy.

Watch the video of the cyclist with Parkinson's disease here: https://bit.ly/3GPZ6PK

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Lately, paleoecologist Audrey Rowe has been a bit preoccupied with a girl named Elma. That's because Elma is ... a woolly mammoth. And 14,000 years ago, when Elma was alive, her habitat in interior Alaska was rapidly changing. The Ice Age was coming to a close and human hunters were starting early settlements. Which leads to an intriguing question: Who, or what, killed her? In the search for answers, Audrey traces Elma's life and journey through — get this — a single tusk. Today, she shares her insights on what the mammoth extinction from thousands of years ago can teach us about megafauna extinctions today with guest host Nate Rott.

Thoughts on other ancient animal stories we should tell? Email us at shortwave@npr.org and we might make a future episode about it!

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Environmental scientist Heidi Appel explains how plants detect sound — and whether talking to yours could help them grow big and strong.

Plus, a bit of listener mail from you! Which you can always send by emailing shortwave@npr.org.

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Many skin conditions, from rashes to Lyme disease to various cancers, present differently on dark skin. Yet medical literature and textbooks don't often include those images, pointing to a bigger problem in dermatology. Today on the show, we take a close look at how the science of skincare has evolved to better serve patients of color, but still has a long way to go.

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An NPR analysis of a key air pollutant showed levels have not changed dramatically since the pandemic curbed car traffic in the U.S. NPR science reporter Rebecca Hersher and NPR climate correspondent Lauren Sommer explain why — and what really makes our air dirty.

Here's their story.

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It's been about a year since the World Health Organization declared the coronavirus a pandemic. The world has learned a lot in that time — about how the virus spreads, who is at heightened risk and how the disease progresses. Today, Maddie walks us through some of these big lessons.

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There's big change that's happening in the field of artificial limbs: artificial limbs that both move — and feel. NPR correspondent Jon Hamilton explains why touch is so important for people who are trying to control a state-of-the art robotic arm or a prosthetic limb.

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Monday another earthquake struck southeastern Turkey, near the Syrian border. This time, the quake registered as a magnitude 6.3 — an order lower than the initial, devastating 7.8 magnitude earthquake and the magnitude 7.5 aftershock that struck the area two weeks ago on Feb. 6. A magnitude 6.3 is still considered strong, according to the United States Geological Survey (USGS). And as NPR previously reported, some locals were inside buildings trying to recover belongings lost in the initial quake when Monday's aftershock hit.

It made us wonder: What are aftershocks? And how long will people in Turkey and neighboring countries like Syria have to endure aftershocks while piecing their lives back together? Days? Years?

For answers, we turned to earthquake geologist Wendy Bohon, who we've previously spoken to about the limitations of earthquake detection.

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We're entering a new era of astrophysics. The James Webb Space Telescope is helping scientists test existing ideas and models of how the universe was created—on a whole new level. This telescope is sending back images of galaxies forming under a billion years after the Big Bang—way earlier than astronomers had previously expected. Not only that, scientists had anticipated that later—but still very early—galaxies would be small, barely formed blobs; instead, the galaxies in these images have spiral arms. So, today's show is all about GALACTIC CONTROVERSY! Computational astrophysicist Jorge Moreno talks with fellow astronomer and Short Wave's Scientist in Residence Regina G. Barber about how these new findings are stirring up controversy in the scientific community and the lessons we can learn from galaxies.

Questions or controversies? Email us at shortwave@npr.org.


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The end of the 2021 hurricane season was officially November 30. This year, there was a lot of hurricane activity. Today on the show, producer Thomas Lu talks to meteorologist Matthew Cappucci about this year's hurricane season — the ups, the lulls, and the surprising end. Plus — how climate change might be affecting these storms.

You can follow Thomas on Twitter @ThomasUyLu and Matthew @MatthewCappucci. Email Short Wave at ShortWave@NPR.org.

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Manu Prakash is the co-inventor of the Foldscope, a low-cost microscope aimed at making scientific tools more accessible. We chat with him about why he wants to change how we think about science, and what it'll take to make science something everyone is able to enjoy. (Encore episode)

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If an asteroid were hurling through space, making a beeline straight to Earth, how would humans prevent it from doing what it did to the dinosaurs? Would we bomb it? Would we shoot lasers at it like a scene from Hollywood's latest sci-fi flick? Well, the folks at NASA have designed and tested a theory.

"The DART mission, the Double Asteroid Redirection Test, is essentially our first test of a kinetic impact for planetary defense." says Cristina Thomas, assistant professor of Astronomy and Planetary Science at Northern Arizona University.

Put simply, scientists at NASA took a spacecraft and crashed it into an asteroid — hoping the little nudge, like bumper cars, would be enough to push the asteroid off course.

Today on the show, Short Wave's scientist-in-residence Regina G. Barber talks to Cristina Thomas about what it was like watching the success of the DART mission and what this means for science and planetary defense.

Email Short Wave at ShortWave@NPR.org. Or, follow us on Twitter at @NPRShortWave.

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Horseshoe crabs have been around for 450 million years — nearly unchanged. And their blood has helped the medical world make some fascinating discoveries. Emily Kwong talks with Ariela Zebede about these living fossils and their role in making medicine safer.

Get in touch! You can email Short Wave at ShortWave@npr.org.

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We're marking Maddie's last week on Short Wave!

Today, Maddie wanted to highlight a COVID-related episode from earlier this year. The pandemic has been a big part of our coverage and this particular episode stands out.

We hear reflections from two emergency room health workers on the pandemic, how their lives have changed and their hopes as more and more people get vaccinated.

Tomorrow, a new episode!

Are you a healthcare worker who would be willing to share your experience with the Short Wave team? Email us at shortwave@npr.org.

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Cylita Guy was a curious child who enjoyed exploring the beaches, parks and animals that shared her hometown of Toronto, Canada. She's an urban ecologist interested in city-dwelling bats. Cylita talks to guest host Lauren Sommer about the importance of studying wildlife in cities and about her children's book, Chasing Bats and Tracking Rats: Urban Ecology, Community Science and How We Share Our Cities. (Encore)

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In which we meet the pioneers of one of the most exciting — and controversial — fields of biomedical research: in vitro gametogenesis, or IVG. The goal of IVG is to make unlimited supplies of what Hayashi calls "artificial" eggs and sperm from any cell in the human body. That could let anyone — older, infertile, single, gay, trans — have their own genetically related babies. As such, the field opens up a slew of ethical concerns.

But that isn't stopping researchers from pressing forward.

So, this episode NPR science correspondent Rob Stein gives us a glimpse into the global race to create the first artificial human embryos to see how the competition is unfolding.

Want to hear more cutting-edge technology? Email the show at shortwave@npr.org.

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For much of the pandemic, some scientists had been pushing the Centers for Disease Control and Prevention to recognize that the coronavirus is spread through aerosols--very small particles that can linger in the air. The CDC did that this month, so we brought Senior Science Correspondent Maria Godoy onto the show to explain the distinction, and the implications for staying safe during the pandemic.

Is the constant refining of the science behind the coronavirus leaving you confused? Send us your questions at shortwave@npr.org and we might answer them on a future episode.

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A few months ago, on a trip to Hawaii, Short Wave host Emily Kwong encountered manta rays for the first time. The experience was eerie and enchanting. And it left Emily wondering — what more is there to these intelligent, entrancing fish?

Today, Emily poses all her questions to Rachel Graham, the founder and executive director of MarAlliance, a marine conservation organization working in tropical seas.

Have you been completely captivated by an animal too? Share your story with us at shortwave@npr.org.

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If you've ever watched part of a professional football game, you've probably seen a tight spiral pass. Those perfect throws where the football leaves the player's hand and neatly spins as it arcs through the air.

But those passes? They seem to defy fundamental physics. And for a long time, scientists couldn't figure out exactly why — until experimental atomic physicist Tim Gay cracked the case just a few years ago. His answer comes after two decades of hobby research and more than a couple late night shouting matches with two other physicists over Zoom.

Today on Short Wave, host Regina G. Barber talks to Tim about this football mystery — and the physics behind the game.

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A new exhibit in Washington, DC, mixes science and technology for an immersive art experience — taking visitors not to a distant land, but into their brains. This installation is a partnership between the Society for Neuroscience and technology-based art space, ARTECHOUSE. Producer Thomas Lu talks to neuroscientist John Morrison and chief creative officer Sandro Kereselidze about the "Life of a Neuron."

You can follow Thomas on Twitter @ThomasUyLu. Email us at ShortWave@NPR.org.

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Did you know there's an insect that can fling its pee 40 times faster than a cheetah accelerates? We did — thanks to a comic from the Bhamla Lab at the Georgia Institute of Technology. Since 2020, principal investigator Saad Bhamla has been leading the charge to make science more accessible by publishing comics alongside every paper his lab publishes. Today, he introduces Emily to two of the most popular characters — Sheriff Sharpshooter and Captain Cicada — and shares why a comic about butt-flicking insects is a valuable way to take science beyond the lab.

Want to hear more about nature's superpowers? Send us an email at shortwave@npr.org.

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Wednesday the Environmental Protection Agency announced new drinking water standards to limit people's exposure to some PFAS chemicals. For decades, PFAS have been used to waterproof and stain-proof a variety of consumer products. These "forever chemicals" in a host of products — everything from raincoats and the Teflon of nonstick pans to makeup to furniture and firefighting foam. Because PFAS take a very long time to break down, they can accumulate in humans and the environment. Now, a growing body of research is linking them to human health problems like serious illness, some cancers, lower fertility and liver damage. Science correspondent Pien Huang joins the show today to talk through this new EPA rule — what the threshold for safe levels of PFAS in tap water is, why the rule is happening now and how the federal standards will be implemented.

Read more of Pien's reporting on the EPA's first ever rule on PFAS in drinking water.

Want to hear more about health and human safety? Email us at shortwave@npr.org — we might cover your question on a future episode!

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How did life start on Earth? The answer is a big scientific mystery scientists are actively investigating. After talking with many scientists, host Regina G. Barber found that an abundance of water on Earth is most likely key, in some way, to the origin of life — specifically, in either deep sea hydrothermal vents or in tide pools. It's for this reason some scientists are also exploring the potential for life in so-called "water worlds" elsewhere in the solar system, like some of the moons of Jupiter and Saturn. This episode, Regina digs into two water-related hypotheses for the origin on life on Earth — and what that might mean for possible alien life.

Have another scientific mystery you want us to cover on a future episode? Email us at shortwave@npr.org — we might feature your idea on a future episode!

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Each year 84,000 people in the U.S. are diagnosed with melanoma. About 90% of these skin cancers are linked to the ultraviolet radiation from the sun. Sunscreen does protect the skin, but dermatologists have found six very common mistakes people make when it comes to using it. NPR science correspondent Allison Aubrey talks to host Regina G. Barber about the science behind sunscreen and how to avoid making these mistakes this summer. They also get into which sunscreens may be better than others.

Have other science stories you want us to cover? Email us at shortwave@npr.org.

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Today we know that one of the easiest and most effective things you can do to protect yourself from the cold, flu, and other respiratory illnesses (including those like the novel coronavirus) is to wash your hands. But there was a time when that wasn't so obvious. Dana Tulodziecki, a professor at Purdue University, tells the story of Ignaz Semmelweis, the scientist who's credited with discovering the importance of handwashing. We'll hear how he figured it out and why there's more to the story. Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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The FDA has issued emergency use authorizations for two monoclonal antibody treatments for COVID-19 – one produced by Eli Lilly and another by Regeneron. As science correspondent Richard Harris explains, emergency use authorization doesn't assure that these new drugs are effective, but that their potential benefits are likely to outweigh the risks. So today, we get to the bottom of how this type of treatment works and if they'll really make a difference.

Email the show your questions, coronavirus or otherwise, at shortwave@npr.org.

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The pandemic has upended every aspect of our lives, including the disorienting way many of us have been perceiving time. It might feel like a day drags on, while a week (or month!) just flies by. We talk with Dean Buonomano, a professor of neurobiology and psychology at UCLA, about his research into how the brain tells time. We'll also ask him what's behind this pandemic time warp.

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Wingspan is a board game that brings the world of ornithology into the living room. The game comes with 170 illustrated birds cards, each equipped with a power that reflects that bird's behavior in nature. Wingspan game designer Elizabeth Hargrave speaks with Short Wave's Emily Kwong about her quest to blend scientific accuracy with modern board game design.

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NPR climate correspondent Lauren Sommer talks with Emily about a dilemma facing many local governments now. Should they develop in areas vulnerable to rising sea levels?

On today's episode, we look at Sunnyvale, California, in the San Francisco Bay Area. It's a situation complicated by a landowner that really wants to continue expanding there, Google.

In an episode last week, we asked who should be paying for climate change — taxpayers or private landowners with waterfront property?

For more on this story, including pictures and videos, click here.

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Three in 10 people in America have a tattoo, and those in the 18 - 34 age bracket, it's almost 40 percent. But what's in those inks, exactly? NPR science correspondent Nell Greenfieldboyce talks about what researchers currently know about tattoo inks. It's not a lot, and researchers are trying to find out more.

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From text churned out by ChatGPT to the artistic renderings of Midjourney, people have been taking notice of new, bot-produced creative works. But how does this artificial intelligence software fare when there are facts at stake — like designing a rocket capable of safe spaceflight?

In this episode, NPR science correspondent Geoff Brumfiel and Short Wave co-host Emily Kwong drill into what this AI software gets wrong, right — and if it's even trying to detect the difference in the first place.

Want to hear more about other advances in the tech space? Email us at shortwave@npr.org!

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All Things Considered host Juana Summers joins Regina G. Barber and Berly McCoy to nerd-out on some of the latest science news buzzing around in our brains. They talk NASA shouting across billions of miles of space to reconnect with Voyager 2, the sneaky tactics trumpetfish use to catch their prey and how climate change is fueling big waves along California's coast.

What science story do you want to hear next on Short Wave? Email us at shortwave@npr.org.

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For people with two hands, one is usually dominant. On a molecular level, life takes this to the extreme. All of the DNA in earthly living things twists to the right, whereas the protein building blocks favor a kind of left-handed chemistry. But in recent years, scientists have worked toward a kind of mirror version of life. The technology to make mirror life likely won't exist for at least a decade. Still, a group of concerned scientists published a 299-page technical report calling for a stop to the science. New York Times science columnist Carl Zimmer explains how a mirror microbe could wreak havoc on life on Earth in the future.

Check out the full technical report and Carl's full article.

Curious about other controversial research? Email us at shortwave@npr.org.

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Math is a complex, beautiful language that can help us understand the world. And sometimes ... math is also hard! Science communicator Sadie Witkowski says the key to making math your friend is to foster your own curiosity. That's the guiding principle behind her new podcast, Carry the Two. It's also today's show: Embracing all math has to offer without the fear of failure.

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Callout time! Do you have a favorite space fact? Send it to us in a voice memo in 20 seconds or less. Include your name and location, and email it to shortwave@npr.org. We may feature your voice in an upcoming episode.

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NPR's Tom Dreisbach is back in the host chair for a day. This time, he reports on a story very close to home: The years-long battle his parents have been locked in with the local wild beaver population. Each night, the beavers would dam the culverts along the Dreisbachs' property, threatening to make their home inaccessible. Each morning, Tom's parents deconstructed those dams — until the annual winter freeze hit and left them all in a temporary stalemate.

As beaver populations have increased, so have these kinds of conflicts with people...like Tom's parents. But the solution may not be to chase away the beavers. They're a keystone species that scientists believe could play an important role in cleaning water supplies, creating healthy ecosystems and alleviating some of the effects of climate change. So, today, Tom calls up Jakob Shockey, the executive director of the non-profit Project Beaver. Jakob offers a bit of perspective to Tom and his parents, and the Dreisbachs contemplate what a peaceful coexistence with these furry neighbors might look like.

Have questions or comments for us to consider for a future episode? Email us at shortwave@npr.org — we'd love to hear from you!

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More than 61 million people in the U.S. are fully vaccinated against COVID-19. We're also now averaging over 3 million shots per day. But at the same time, in at least 20 states, reported cases are on the rise again. So today, NPR health correspondent Allison Aubrey rounds up some of the latest coronavirus news – on vaccines, CDC guidance on travel, the possibility of a fourth wave, and more.

Have questions or concerns around the pandemic? Email us at shortwave@npr.org.

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The federal government has been tracking the weather for more than 150 years. Yet over the last few decades, the rise of the Internet and big tech have made weather forecasting a more crowded space. Today, our colleagues at NPR's daily economics podcast The Indicator report on the value of an accurate forecast and the debate over who should control weather data. Follow The Indicator on Apple Podcasts or Spotify.

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We close out Climate Solutions Week with a look at the final step in the food system: waste. Roughly 30-40% of all food produced globally gets thrown out — a huge problem when it comes to climate change. Shuggie's Trash Pie and Natural Wine has answers for what to do with all that waste – be it bruised fruit and wilted greens salad or meatballs made out of beef hearts. The San Francisco restaurant describes itself as a "climate-solutions restaurant" — and they're hoping you find these dishes appealing. Or at least, that you're willing to give them a try. Shuggie's is one of a growing number of eateries trying to address this problem.

Interested in hearing more climate solutions? Email us at shortwave@npr.org.

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It's baseball season! And when we here at Short Wave think of baseball, we naturally think of physics. To get the inside scoop on the physics of baseball, like how to hit a home run, we talk to Frederic Bertley, CEO and President of the Center of Science and Industry, a science museum in Columbus, Ohio. He also talks to host Regina G. Barber about how climate change is affecting the game.

Interested in the science of other sports? Email us at shortwave@npr.org — we'd love to hear from you.

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Science writer Jennifer Leman did it. She ranked all 158 moons in our solar system. The criteria? Interviews with NASA scientists, astronomers, and her own moonpinions. She talks to host Maddie Sofia about some of her favorites. Here's her full list for Popular Mechanics.

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Raychelle Burks is a forensic chemist AND a big fan of murder mysteries. Today, we talk pop culture forensics with Raychelle and what signs to look for to know whether or not a tv crime show is getting the science right.

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Millions of Americans are planning to travel this week and gather inside for Thanksgiving — many in groups of 10 or more. At the same time, COVID-19 cases are rebounding. NPR correspondent Allison Aubrey's been talking to experts to find out how to gather in-person as safely as possible and minimize a new surge.

Read the CDC's tips on gathering for the holidays: https://www.cdc.gov/coronavirus/2019-ncov/daily-life-coping/holidays/celebrations.html

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Governors across the southeastern United States have declared statewide states of emergency as Hurricane Helene continues its ascent. After forming in the northwestern Caribbean Sea Tuesday, Helene escalated from a tropical storm, then to a cyclone, and finally to a Category 4 hurricane by the time it made landfall late Thursday night. We talk to hurricane climatologist Jill Trepanier about how a storm tropical storm system rapidly intensifies into a major hurricane, the impact of a changing climate on future storms — and why the devastation doesn't stop at the shore.

Follow local updates on Hurricane Helene.

Want to know more about the scientific underpinning of serious weather events? Email us at shortwave@npr.org — we might cover it on a future episode!

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Short Wave is going outside every Friday this summer! In this second episode of our series on the National Park system, we head to Big Thicket National Preserve in Texas. Among the trees and trails, researchers like Adela Oliva Chavez search for blacklegged ticks that could carry Lyme disease. She's looking for answers as to why tick-borne illnesses like Lyme disease are spreading in some parts of the country and not others. Today: What Adela's research tells us about ticks and the diseases they carry, and why she's dedicated her career to understanding what makes these little critters... tick.

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In honor of Black History Month, Short Wave is focusing on Black scientists and educators — people doing incredible work and pushing for a world where science serves everyone. Enjoy!

Follow Maddie and Emily on Twitter, @maddie_sofia and @emilykwong1234. Email the show at ShortWave@npr.org.

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It's a phrase we're hearing a lot now, social distancing. Practicing it is essential to slowing the spread of the coronavirus. But what does it really mean? NPR's Maria Godoy gives us advice on what good social distancing looks like in our daily lives - from socializing with friends to grocery shopping to travelling.

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Saturday, the entire coastal town of Grindavik, Iceland was evacuated. That's because over the weekend, the country experienced nearly 2,000 earthquakes within 48 hours. And they've kept coming since then – in swarms. Scientists think the quakes are indicative of magma moving closer to the surface in the country's southwestern peninsula and that a local volcano could erupt at any moment. Today on the show, host Regina G. Barber talks to volcanologist Diana Roman about the science behind these earthquakes.

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Would you survive as a doctor in The Sims 4? What's an appropriate amount of free food to take from a public sample station before it's greedy? And how much do clock towers affect sleep? These are the types of questions answered in the Christmas issue of The BMJ — one of the journal's most highly anticipated issues each year. And we find out the answers in this very episode. So, sit back, relax and prepare to be amused by this ghost of Christmas Past (encore).

Check out what's been published so far in the 2023 issue. (We particularly like the research about the associated health risks and benefits of various Great British Bakeoff Ingredients.)

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... Could a monkey host this podcast?

Aaron Scott and Resident Neuroscience Nerd Jon Hamilton discuss the vocal capabilities of our primate relatives. From syllables and consonants to rhythm and pitch, certain monkeys and apes have more of the tools needed for speech than was once thought. Now scientists are looking to them for insights into the origins of human speech.

What animal should we study next? Email the show at shortwave@npr.org.

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A deadly triangle of factors is killing off U.S. honeybees. Last year, forty percent of honeybee colonies died in the U.S., continuing an alarming trend. Entomologist Sammy Ramsey tells host Maddie Sofia about the "three P's" and what listeners can do to help our fuzzy-flighted friends.

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This week is our last with Maddie as a host, so we're spending it with a trip down memory lane. The first episode Maddie invites us to relive and enjoy is our first listener question episode on the science behind thrill-seeking. She talks to psychologist Ken Carter about why some people love to get scared.

Reach the show by emailing shortwave@npr.org.

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A deadly virus believed to have originated in China was found in the US this week. NPR global health correspondent Jason Beaubien explains what we know and don't know about the disease — and the likelihood it will continue to spread.

Follow Jason on Twitter @jasonbnpr. More of NPR's reporting on the virus can be found here.

Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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When Markus Buehler heard about the coronavirus, he wanted to know what it sounded like. Today on the show, Maddie speaks with Short Wave reporter Emily Kwong about how Markus Buehler, a composer and engineering professor at MIT, developed a method for making music out of proteins, and how music can potentially help us hear what we have trouble seeing at the nanoscale level.

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Some dairy farmers in Massachusetts are using food waste and manure to create renewable energy. Each farm produces enough to power about 1,500 homes. Not only does this process create electricity, NPR Science Correspondent Allison Aubrey tells us it also prevents the release of methane, a greenhouse gas. Follow Short Wave's Emily Kwong on Twitter @emilykwong1234. Email the show at shortwave@npr.org.

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It feels like this is the summer of space launches. So, it's only appropriate that we kick off our new series Space Camp with a look at space launches. Throughout the series, Regina and Emily will plumb our universe to uncover the strange, wonderful things happening all around us. This episode, that entails answering a series of questions about getting to space: What does hurtling into space feel like? What physics are involved? And what's the "junk" in Earth's orbit?

Space Camp episodes drop every Tuesday in the Short Wave feed in addition to our regular episodes happening every Monday, Wednesday and Friday.

For a full explainer of Newton's third law of motion, g-forces and visuals on his cannonball thought experiment, check out our digital story.

Have a particular aspect of space you want us to cover in a future episode? Email us at shortwave@npr.org — we'd love to hear from you!

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For the past 70 years, schizophrenia treatments all targeted the same chemical: dopamine. While that works for some, it causes brutal side effects for others. An antipsychotic drug approved last month by the FDA changes that. It triggers muscarinic receptors instead of dopamine receptors. The drug is the result of a chance scientific finding ... from a study that wasn't even focused on schizophrenia. Host Emily Kwong and NPR pharmaceutical correspondent Sydney Lupkin dive into where the drug originated, how it works and what it might shift for people with schizophrenia.

Read more of Sydney's reporting.

Curious about other drug treatments in the news? Email us at shortwave@npr.org and we might cover your topic on a future episode!

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Today on the show, next-generation energy innovators Bill David and Serena Cussen challenged us to think about the future of clean energy storage. They spoke to Emily Kwong at the 2023 annual meeting for the American Association for the Advancement of Science (AAAS) in Washington D.C.

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Some ants herd aphids. Some farm fungi. And now, scientists have realized that when an ant injures its leg, it sometimes will turn to a buddy to perform a lifesaving limb amputation. Not only that — some ants have probably been amputating limbs longer than humans! Today, thanks to the reporting of ant enthusiast and science correspondent Nell Greenfieldboyce, we behold the medical prowess of the ant.

Want to hear more cool stories about the tiny critters among us? Email us at shortwave@npr.org — we'd love to know!

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Black holes are one of the most beguiling objects in our universe. What are they exactly? How do they affect the universe? And what would it be like to fall into one? We venture beyond the point of no return with Yale astrophysicist Priyamvada Natarajan, into a fascinating world of black holes — where the laws of physics break down.

Talk the mysteries of our universe with Short Wave reporter Emily Kwong on Twitter @emilykwong1234. Email the show your biggest cosmological questions at shortwave@npr.org.

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Short Wave's Emily Kwong talks with NPR health correspondent Allison Aubrey about some of the latest coronavirus news, including the return of the Johnson & Johnson vaccine in the U.S. and vaccine outreach in harder to reach communities.

Have questions about the latest coronavirus headlines? Email us at shortwave@npr.org and we might cover it on a future episode.

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For over a decade, Dr. Thomas Insel headed the National Institute of Mental Health and directed billions of dollars into research on neuroscience and the genetic underpinnings of mental illnesses. Health correspondent Rhitu Chatterjee talks with Dr. Thomas Insel about his new book, Healing: Our Path from Mental Illness to Mental Health and how he came to realize where the U.S's mental health care system had failed, despite scientific advances in the field.

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The Trump administration has officially eliminated federal protections for Alaska's Tongass National Forest, the largest intact temperate rainforest in the world. With the rollback of the Roadless Rule, nine million previously-protected acres are now open further to potential development. What does that mean for trees that have been storing carbon for centuries?

For more on this story, check out the episode page. You can email the show at shortwave@npr.org.

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Thor. Loki. Heimdall. They're not just Norse gods or Marvel characters. They're also the names of various Asgard archaea. These microscopic organisms are found all over the world, from marine sediment to mud volcanoes to hydrothermal vents. A growing body of research suggests we owe them an evolutionary debt. This episode, Emily and guest host Jon Hamilton explore the wild world of archaea: Where are they from? What do they do? And what can they tell us about the origins of life on earth?

Interested in more stories about life's origins? Email us at shortwave@npr.org. We'd love to hear from you!

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Diabetes is a growing global problem, especially in low and middle income countries. Half of the 100 million in need of insulin lack reliable access. The World Health Organization wants to do something about it. Short Wave reporter Emily Kwong tells host Maddie Sofia about the WHO's pre-qualification program, a two-year plan to pave the way for more insulin manufacturers to enter the global market.

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Julia Ruth has a pretty cool job: it takes a lot of strength, a lot of balance, and a surprising amount of physics.

As a circus artist, Julia has performed her acrobatic Cyr wheel routine around the world. But before she learned her trade and entered the limelight, she was on a very different career path--she was studying physics.

Julia talks with Emily (who also shares a past life in the circus) about her journey from physicist to circus artist, and how she learned her physics-defining acts.

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What your parents didn't tell you about pulling an all-nighter? It just might ease depression for several days. At least, that's what researchers found happens to mice in a study published in the journal Neuron Thursday.

Most people who've stayed up all night know the "tired and wired" feeling they get the next day. Scientists know this feeling can have a strong antidepressant effect in people that lasts for several days, even after the other changes wear off. But this new study may help researchers figure out why sleeplessness causes this effect.

Plus, we get into some other science headlines we can't stop talking about: Turning a centuries-old debate over starfish on its head and record lows for Antarctica's sea ice.

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The U.S. territory of Puerto Rico has the most older Americans per capita, making their population especially vulnerable to the coronavirus. A vital tool in preventing its spread there? Timely and culturally relevant public health information in Spanish. Maddie talks with Mónica Feliú-Mójer of the group CienciaPR about their science communication efforts.

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Host Emily Kwong wants to keep an eye on her carbon footprint. Most of it consists of greenhouse gas emissions from driving her car or buying meat at the grocery store. But it's not so obvious how to measure those emissions, or how factories, cargo ships, or even whole countries measure theirs.

Enter: NPR science reporter Rebecca Hersher. Together, Rebecca and Emily break down how greenhouse gas emissions are tallied ... and why those measurements are so important in figuring out who's responsible for cleaning up.

What should we measure next? Email the show at shortwave@npr.org.

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In 1962, the first spacecraft humans ever sent to another planet — Mariner 2 — went to Venus. The first planet on which humans ever landed a probe — also Venus! But since then, Mars has been the focus of planetary missions. NPR science correspondent Geoff Brumfiel makes the case for why humans should reconsider visiting to Venus.

For more science reporting and stories, follow Geoff on twitter @gbrumfiel. And, as always, email us at shortwave@npr.org.

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The United States has a goal of net-zero carbon emissions by 2050. Without serious changes to lifestyles, that means dramatic investments in green energy. But environmental laws can actually get in the way.

Today, our colleagues at NPR's daily economics podcast, The Indicator from Planet Money, compare the threats to two bats on opposite ends of the planet. The bats show the tension between local and global environmentalism and how building a green economy is forcing people to have tough conversations about tradeoffs.

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For nearly forty years, the Guam Rail bird (locally known as the Ko'Ko') has been extinct in the wild — decimated by the invasive brown tree snake. But the Ko'Ko' has been successfully re-introduced. It is the second bird in history to recover from extinction in the wild. Wildlife biologist Suzanne Medina tells us the story of how the Guam Department of Agriculture brought the Ko'Ko' back, with a little matchmaking and a lot of patience. (Encore episode)

Follow host Maddie Sofia @maddie_sofia and reporter Emily Kwong @emilykwong1234 on Twitter. Email the show at shortwave@npr.org.

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More than 100 cities are monitoring sewage for the presence of the coronavirus, and public health officials think wastewater could provide an early warning system to help detect future spikes. NPR science correspondent Lauren Sommer explains how it works, and why scientists who specialize in wastewater-based epidemiology think it could be used to monitor community health in other ways.

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The cicadas are coming! After 17 years, Brood X is emerging this spring to mate. If you're in the eastern part of the United States, get ready to be surrounded by these little critters! Host Maddie Sofia talks with entomologist Sammy Ramsey, aka Dr. Buggs, about what cicadas are, where they've been for the last 17 years, and — of course — why they're so loud.

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There's a lot going on with the coronavirus. To keep you up to speed, we'll be doing more regular updates on the latest about the pandemic. Today, NPR science correspondents Jon Hamilton and Nell Greenfieldboyce discuss challenges in testing for the virus and how COVID-19 affects the elderly.

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It's another Micro Wave! Today, what happens in your brain when you notice a semantic or grammatical mistake ... according to neuroscience. Sarah Phillips, a neurolinguist, tells us all about the N400 and the P600 responses.

Plus, we dive into some listener mail — which you can send to us by emailing shortwave@npr.org.

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Ever wonder what's causing all those reactions in your body when you're falling in love with someone? We certainly did. So, we called up Adam Cole, who gathered up all the science and wrote "A Neuroscience Love Song" for NPR's Skunk Bear back in the day. Follow Maddie Sofia and Adam Cole on Twitter. Email love letters to the show at shortwave@npr.org.

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Short Wave hosts Aaron Scott and Emily Kwong quiz All Things Considered hosts Mary Louise Kelly and Sacha Pfeiffer on some science questions Short Wave has reported on over the past year. They say they consider all the things, but do they consider the science enough? Quantum physics, prehistoric creatures and spelunking are all fair game in this friendly battle of the brains.

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P.S. Short Wave is continuing our birthday celebration by hanging out with all of you on Twitter Spaces! We'll be on NPR's Twitter account @NPR on October 19 at 3pm Eastern, talking about the goofiness of our show and answering your questions. Join us!

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When the dinosaurs walked the Earth, massive marine reptiles swam. Among them, a species of Ichthyosaur that measured over 80 feet long. Today, we look into how a chance discovery by a father-daughter duo of fossil hunters furthered paleontologist's understanding of the "giant fish lizard of the Severn." Currently, it is the largest marine reptile known to scientists.

Read more about this specimen in the study published in the journal PLOS One.

Have another ancient animal or scientific revelation you want us to cover? Email us at shortwave@npr.org — we might talk about it on a future episode!

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Gene editing was a new idea in the mid-1970s. So when Harvard and MIT planned new research in recombinant DNA, alarm bells went off. "People were worried about a 'Frankengene,'" says Lydia Villa-Komaroff, then a freshly minted PhD. Amidst a political circus, the city of Cambridge, Massachusetts banned research into recombinant DNA, forcing scientists like Villa-Komaroff into exile. But that turned out to be just the prelude to a breakthrough. In this episode, Dr. Villa-Komaroff tells Emily Kwong the story of overcoming the skeptics and coaxing bacteria into producing insulin for humans.

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If you work at home or in an office, you might spend a lot of your day sitting down and staring at a computer screen. That can have lots of negative effects – but it's hard to carve out significant time in the day to counteract that.

Our friends at NPR's TED Radio Hour wanted to know if small, frequent movement breaks might do the trick instead. Along with Columbia University Medical Center, they conducted a study of over 20,000 listeners and asked them to incorporate these movement breaks into their day. Today on the show, TED Radio Hour's Manoush Zomorodi digs into the surprising preliminary results with Columbia University researcher Keith Diaz.

Ideas to get moving? We want to hear them! Get in touch at shortwave@npr.org.

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When Abra Lee became the landscape manager at Hartsfield-Jackson Atlanta International Airport, she sought some advice about how to best do the job. The answer: study the history of gardening. That led to her uncovering how Black involvement in horticulture in the U.S. bursts with incredible stories and profound expertise, intertwined with a tragic past. She's now teaching these stories and working on a book, Conquer the Soil: Black America and the Untold Stories of Our Country's Gardeners, Farmers, and Growers. Abra Lee talks with former Short Wave producer Eva Tesfaye about uncovering Black horticultural history and several of the hidden figures who shaped it.

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The Supreme Court heard arguments this week in a case brought by the city of Baltimore against more than a dozen major oil and gas companies including BP, ExxonMobil and Shell. In the lawsuit, BP P.L.C. v. Mayor and City Council of Baltimore, the city government argues that the fossil fuel giants must help pay for the costs of climate change because they knew that their products cause potentially catastrophic global warming. NPR climate reporter Rebecca Hersher has been following the case.

Read Rebecca's digital piece about the Supreme Court case here.

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Humans are hardwired to see faces — even in inanimate objects. We have a lima bean-shaped part of our brains dedicated to facial recognition. But this process isn't always straightforward. Science journalist Sadie Dingfelder is one of 10 million Americans who are face blind, or struggle to recognize the faces of people they know. In her new book, Do I Know You? she dives into this, as well as the science of memory and imagination.

Want more episodes on the wonder of the human brain? Email us at shortwave@npr.org.

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The 1918 flu outbreak was one of the most devastating pandemics in world history, infecting one third of the world's population and killing an estimated 50 million people. While our understanding of infectious diseases and their spread has come a long way since then, 1918 was notably a time when the U.S. practiced widespread social distancing.

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The COVID-19 has exposed longstanding and massive health disparities in the U.S., resulting in people of color dying at disproportionately higher rates than other races in this country. Today on the show, guest host Maria Godoy talks with Usha Lee McFarling about her reporting — how new funding and interest has led to increased attention to the topic of disparities in health care and health outcomes, but also left out or pushed aside some researchers in the field — many of them researchers of color.

You can follow Maria on Twitter @MGodoyH. Email ShortWave@NPR.org.

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At the Ol Pejeta Conservancy, a wildlife preserve in central Kenya, lions and cheetahs mingle with zebras and elephants across many miles of savannah – grasslands with "whistling thorn" acacia trees dotting the landscape here and there. Twenty years ago, the savanna was littered with them. Then came invasive big-headed ants that killed native ants — and left the acacia trees vulnerable. Over time, elephants have knocked down many of the trees. That has altered the landscape — and the diets of other animals in the local food web.

Curious about other science news? Email us at shortwave@npr.org.

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How much salt is too much salt?

Most likely, the amount you're consuming.

A new study published this week in the journal JAMA found that cutting one teaspoon of salt a day results in a decline in blood pressure comparable to taking medication. Plus, other science news from this week, like the oldest confirmed black hole and how climate change and pollution are causing a big imbalance in the sexes of turtles.

Got other science news for us to consider? Email us at shortwave@npr.org.

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For Black History Month, Short Wave is celebrating Black voices in STEM - bringing back some of our favorite conversations, as well as new guests with expertise and insights to share. In this encore episode, former Short Wave host Maddie Sofia talks to inventor James West about his life, career, and about how a device he helped invent in the 60's made their interview possible. (Encore)

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We're all spending more time these days at home — including our bathrooms. But why do they look the way they do? From toilets to toothbrush holders, bioethicist and journalist Elizabeth Yuko explains how infectious diseases like tuberculosis and influenza shaped American bathroom design. And, we explore how the current pandemic could inspire a new wave of innovation in the bathroom.

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As the U.S. continues to grapple with systemic racism, some in the medical community are questioning whether the diagnostic tools they use may be contributing to racial health disparities.

As NPR science correspondent Maria Godoy reports, that debate is playing out prominently in the world of kidney medicine — specifically, in the use of estimated glomerular filtration rate, or eGFR. The diagnostic formula most commonly used to assess the health of patients with chronic kidney disease may be unintentionally contributing to poor outcomes — and reinforcing racist thinking.

Read Maria's piece here.

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This year's United Nations climate talks, COP29, wrapped Saturday. Throughout the talks, it was all about the numbers. With the help of NPR climate reporters Julia Simon and Alejandra Borunda, we home in on two. First, $300 billion. That's the amount of money wealthy countries agreed to give developing countries to help them adapt to climate change and reduce pollution. Second, 1.5C. That's a warming limit countries agreed to try not to breach, but that is creeping closer every year.

Want to hear the latest in climate news and solutions? Let us know your thoughts by emailing 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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A few years ago, climate scientist Kim Cobb had a brutal realization about how much she was flying for conferences and meetings. Those flights were adding lots of climate-warming carbon dioxide into the atmosphere. Host Maddie Sofia talks with her about her push to get scientists to fly less for work, and what happened when the pandemic suddenly made that idea a reality.

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A few years ago, ecologist Elizabeth Clare had an idea--what if she could study rare or endangered animals in the wild without ever having to see or capture them? What if she could learn about them by only pulling data out of thin air? It turns out, the air's not so thin. There are bits of DNA floating around us, and Elizabeth figured out how to collect it. She talks to guest host Lauren Sommer about testing her collection method in a zoo, how another science team simultaneous came up with and tested the same idea and how DNA taken from the environment could revolutionize the field of ecology.

Read about the study here.

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