Short Wave
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.
Episodes
The problem with modern avocados — and the ancient solution
Did you know that when you pick up avocados at the supermarket, make avocado toast at home or order guacamole in your burrito, you’re probably consuming only one genetic type of avocado? Yep, it’s the Hass avocado. Since it originated in California in the 20th century, it’s been grafted onto trees worldwide. And today, it makes up more than 80 percent of commercial avocado production. Its bounty i
Does the science of peptides live up to the hype?
Synthetic peptides are getting some serious hype, from fitness influencers on your FYP to people seeking new options for chronic conditions. And while the human body already makes peptides, like insulin and the hormone oxytocin, most of the viral synthetic peptides are not approved by the Food and Drug Administration. Scientists say that raises some big concerns about safety and efficacy. So ahead
Cyclosporiasis: the science, risks and red flags
What’s small, round and could give you explosive diarrhea? Cyclospora parasites. The diarrheal disease they cause is wreaking havoc on thousands this summer in what is the largest known flare up in the U.S. ever. What’s causing it and what can we do about it? NPR’s Joseph Kim joins host Nate Rott to talk about the outbreak – and how to protect yourself and your loved ones.Read more of Joseph’s rep
Are Trump and AI driving a nuclear power boom?
A race started by President Trump is leading to the rapid construction of new, experimental nuclear reactors. If they work, they could power data centers for artificial intelligence. But critics worry that the breakneck pace is compromising safety and public trust. NPR correspondent Geoff Brumfiel talks about the potential risks and benefits, and whether this may lead to a new nuclear age.Read mor
Why did designing the World Cup pitches take eight years?
Yamal and Messi aren’t the only stars of the World Cup finals. If you’ve been watching any of the games, you’ve probably stared directly at a huge, unsung hero: the turf. Turf grass science is a real thing, and it’s John Sorochan’s area of expertise. He’s a scientist at the University of Tennessee at Knoxville, and he’s spent the last eight years preparing for the grass pitch the players are scori
Our favorite brains, including Einstein's stolen one
At Short Wave, we love a good brain. Which is why we’ve had a lot of conversations over the years with NPR’s neuroscience reporter, Jon Hamilton. Jon’s been writing about brains for over 15 years, from tiny brain organoids that grow in a dish, to fruit fly brains, mouse brains and some really memorable human brains. But Jon is retiring, so today on the show he joins us to share the most memorable
What's this super-aging butterfly’s longevity secret?
What if there were a great ape species that could live over 1,000 years? That’s basically Heliconius in the butterfly world. The insects live around 25 times longer than their butterfly cousins, and scientists think they have one clue as to why: pollen. But as Katie Wu, a science writer at The Atlantic, explains, that’s not the whole story. She and host Nate Rott also talk about how bats sip from
How should we decide who, or what, is conscious?
In the age of AI, what differentiates humans from robots? What makes humans … human? To find answers, many people are studying consciousness: our capacity for experience. But doctors and researchers still have a long way to go when it comes to finding new ways to detect consciousness in humans — much less computer software. That gets especially tricky when people are unable to use their words or b
Plot twist: We're probably way undercounting insects on Earth
Maybe you’ve wondered about it late at night as a mosquito buzzes in your ear. Or when you kick over a rock and watch dozens of little critters crawl away: How many types of insects are there in the world? Scientists have been interested in answering this question for years. A new study — based on a census of tiny and, frankly terrifying, parasitoid wasps — suggests there’s way more than previousl
NASA's race against time to rescue a falling satellite
A valuable NASA satellite observatory is falling to Earth faster than scientists expected. It’s called the Neil Gehrels Swift Observatory, or “Swift” for short, and it can respond to celestial events much faster than its sky-gazing counterparts. To save Swift and test out a first-of-its-kind technology, NASA partnered with an Arizona-based startup to launch a refrigerator-sized robot, aptly named
Could this anti-aging dog pill lead to one for you too?
Every dog lover’s greatest fear is inevitably losing their pet to time. We want our furry pals to stick around as long as they can. That wish may soon become reality with a new pill from a company called Loyal. It aims to extend the lives–and health–of dogs. This new drug also serves as a pitstop on a much bigger quest: to eventually lengthen human lives.Interested in more science about your pets?
Sky Uber? Air taxis could be here soon
Taking an air taxi to the airport may become as simple as ordering a ride share today. In our first episode in our summer series Tech Camp, we explore how a futuristic vehicle that transforms from helicopter to propeller plane is already taking flight in New York and San Francisco. This new kind of commuting might be here sooner than you think: A law just went into effect to build infrastructure f
This July 4th, are you a thrill- or chill-seeker?
Independence Day is approaching!Imagine if someone has procured illegal fireworks from a couple of states over. Are you:1. first in line to light them?2. content to watch while others set them off?3. going to find a fire extinguisher — just in case — while loudly condemning the activity?Ken Carter, a psychologist at Oxford College of Emory University, says everyone has a different level of sensati
Is setting your trash on fire a good idea?
The U.S. generates 292 million tons of trash each year – and that trash has to go somewhere. Sometimes, that’s to an incinerator, where it’s burned and turned into electricity. Proponents of incineration applaud the ability to generate energy from waste and divert garbage from landfills. Opponents worry about the potential health risks, especially to minoritized communities. Today on the show, we
Ticks are a growing problem, no matter where you live
In the grand scheme of things, Lyme disease is a fairly new scientific discovery. It was first traced back to ticks in the late 70s and early 80s. The tick-borne illness can cause a rash, fever, pain, neurological complications, and even facial paralysis. It’s spread by only two of the nearly 50 species of ticks in the United States. Historically, most Lyme cases were limited to a small region, in
Is working from home actually good for you?
For many, being able to work from home is a boon: saving time on your commute, working in your sweatpants, throwing in a load of laundry before a meeting. People say it makes them happier. But a new study suggests that, despite all the advantages, working from home isn’t creating a happier workforce. It’s making people more socially isolated. We get into all the details with NPR mental health corr
Salty Clouds aren’t the only strange thing about this object in space
There’s an object in space 25 times the size of Jupiter that’s stumped scientists for years. They haven’t been able to figure out if it’s a planet or a failed star. But scientists are one step closer to an answer thanks to the powerful James Webb Space Telescope. After analyzing data collected by the telescope, astronomers have uncovered unexpected new clues floating light years away from us: Salt
Did Trump's foreign aid cuts fuel the Ebola outbreak?
The Ebola outbreak in the Democratic Republic of Congo is growing – and is likely larger than official numbers show. The deadly disease spreads through bodily fluids, on average killing half the people it infects. And while officially declared in May, the case numbers point to the virus circulating for months without being detected. To make matters worse, there’s not a vaccine for this specific sp
What can a tornado teach us about kindness?
One evening in May of 2011, tornado sirens went off in a small Missouri city called Joplin. Thousands of homes were destroyed in the tornado, about a third of the town’s 50,000 residents were displaced and around 160 people died. And in the months following the tornado, the town became known not just for the destruction, but the kindness and cooperation that led to its recovery. Scientists who hav
Inside the mysterious minds of horses
Janet Jones has been fascinated by horses since childhood. She’s now a horse trainer and a neuroscientist, which allows her to explore the minds of the animals to which she’s devoted her life. She even recently wrote a book all about their brains. She says there’s an enormous gap between the way humans have relied on horses for tens of thousands of years – and what we actually know about their bra
Why scientists launched two little robots to the moon
Two tiny transforming robots landed on the moon! These baseball-sized bots accompanied Japan's first successful lunar lander. They rolled out of SLIM as balls and transformed into a rover. The bots cracked down the middle to reveal a little camera in the center. The halves then acted as spinning wheels that helped them waddle, bounce and roll over hard terrain as they explored. In this roundup of
Is sewage the future of green aviation?
The war in Iran has disrupted the global fuel supply. That has sent airline prices soaring and cancelled scores of flights. This got Short Wave host Emily Kwong wondering: Could another fuel source help take us to the skies? Today on the show, we explore the chemistry and cost of sustainable aviation fuel. Along the way, we highlight two initiatives to create a regional SAF supply – one in Washing
Could air pollution make your memory worse?
Summer is here, your windows are open and the smell of…car exhaust and the latest wildfire are wafting in. This air pollution is harmful to almost every organ, including the brain. Today on Short Wave, we talk about one way air pollution may cloud your memory.Interested in more episodes about how where we live affects us? Email us your question at shortwave@npr.org and we may turn it into an episo
Inside the lab taste-testing the world's chocolate
Could standardizing chocolate help small-scale farmers? Chocolate scientist Julien Simonis thinks it could help persuade consumers to pay for higher quality chocolate, in turn helping out these growers. Every cacao bean is different, and for a long time, there wasn't a standard way of comparing the quality of chocolate. But in 2009, a sustainable agriculture nonprofit started a program called Caca
Why your sunscreen is finally getting a major upgrade
Until this week, the United States hadn’t approved a new sunscreen ingredient in over 20 years. That changed Tuesday, when the FDA approved a new chemical for U.S. sunscreens. It’s called bemotrizinol, and NPR science correspondent Maria Godoy joins us to tell us all about it — including the soonest it’s expected to hit shelves.Interested in more science news? Email us your question at shortwave@n
How a single flu shot could protect you for decades
Every year, tens of millions of people in the U.S. get the flu vaccine. That’s because the virus changes year-to-year and protection only lasts around six months. Adolfo Garcia-Sastre wants to change that. He’s one scientist working on a universal flu vaccine that could provide decades of protection against all flu illnesses – but only if his team can find the resources that disappeared when U.S.
Your DNA is changing all the time. Here’s why
We tend to think of the DNA strands that contain our genetic code as consistent, stable units. But in reality, the cells that make up our bodies are constantly replicating and changing. Even as you read this sentence, in fact, the genes within your cells are mutating. So, what causes these mutations and what’s the impact? Science writer Roxanne Khamsi examines the answers in her new book, Beyond I
Inner monologues are still a mystery
Emily Kwong is pretty sure she lacks an inner monologue, while the inner monologue of producer Rachel Carlson won’t stop chatting. But how well can a person know their inner self? And what does science have to say about it? We dig in in this encore episode of Short Wave.To learn more about Charles Fernyhough’s research on voice hearing, visit the project website. If you liked this episode, check
Prepare to be baffled by what we don't know about eels
More than a century ago, all that people knew about European eels was that they lived in the rivers and streams for decades — until they swam out to the ocean and never returned. Eventually, tiny eels would show up and the cycle would start again. Where did the adult eels go? Where did the baby eels come from? Did they even reproduce at all or just spontaneously emerge into being? Science now has
This common garden plant summons wasps as bodyguards
In our latest science news roundup: how nature adapts, for better or worse. When faced with pests, plants may not be able to run away – but that doesn’t mean they’re defenseless. Some have thorns or spines, others have poisonous leaves or berries, and still others have…elaborate chemical defense alarm systems? In a recent study, researchers discovered that the common bean plant, P. vulgaris, has a
Why are scientists planting tiny forests in big cities?
Healthy forests help combat climate change, provide humans with drinking water and even improve mental and physical health. But it’s hard to imagine an entire forest in the middle of a big city. That’s where micro-forests come into play — public forests on a smaller scale, filled with native plants. They exist around the world, and producer Rachel Carlson went to visit the largest micro-forest in
Why you can't stop scrolling: the science of 'dark flow'
You pick up your phone to do one quick task, and suddenly 20 minutes have flown by without you even noticing. How do apps do that to you? Science journalist Michaeleen Doucleff felt like her phone had superglue on it, holding her on it for hours each day while draining her of time and energy. Turns out, that feeling isn’t accidental. In her new book, Dopamine Kids, Michaeleen describes four featur
This distant planet has wild weather and gemstone clouds
For many astronomers and astrophysicists there are two distinct, important periods: before the James Webb Space Telescope – and after. It has powered many scientific discoveries since it came online, including two at the heart of this episode: insights into one of Neptune’s moons and a “hot Jupiter” exoplanet orbiting another star. This exoplanet has a strange weather system with high winds and cl
Should we reengineer the world's deadliest animal?
The most ferocious predator for us humans is actually quite small: the mosquito. They are hungry for blood, spreading diseases like malaria, yellow fever and dengue – and picking up new ones all the time. But what if we could wipe out the mosquito? Gene-editing technology could do it, potentially saving millions of lives. But it comes with serious potential for risk. Which begs the question: Shoul
Is it getting windier?
Is it getting windier? Long-time listener Barry Zalph thinks it is, at least in Louisville. And he’s not the only one. Redditors and local reporters have noticed a recent uptick in the region’s windstorms, too. But does that point to any larger trends in windiness? And if so, what could be causing it? We talked to meteorologist and extreme weather specialist Scott Gunter to find out. Plus, we dig
The magic — and science — of synchronous fireflies
Every year for two weeks between mid-May and mid-June, Congaree National Park in South Carolina is home to a fairy-tale-like display of flashing lights. These rhythmic performances happen all because of thousands of fireflies, flashing their belly lanterns at exactly the same time. According to the National Park Service, there are just three species of these synchronous fireflies in North America,
The supertree shielding coastlines and storing carbon
Coastal fishing communities around the world are struggling with declining fish stocks. That’s because of climate change, environmental degradation and overfishing. But one tree – the humble mangrove – has a superpower that’s supporting healthy fisheries in many parts of the world. The majority of fishes we eat worldwide are supported by mangroves: Their roots serve as a nursery for baby fish. So,
Why renaming this common hormonal disorder is a huge deal
You probably know someone who has a condition that, until last week, was known as PCOS, or polycystic ovary syndrome. It affects one in eight reproductive-aged women. But despite it being such a common disorder, patients are often misdiagnosed and have delayed treatment. Now, medical professionals are trying to change that. After 15 years of work, the condition has been renamed to PMOS, or polyend
A solution for California's water woes
For years, farmers in California have been pumping huge amounts of water from their wells to irrigate their crops. The state’s Central Valley is the nation’s single biggest source for many different foods. But all that water use is making aquifers shrink, wells go dry and, in some places, the ground sink. Science reporter Dan Charles has been looking into the issue and is on the show today to talk
What's up with your nightmares?
Dreams of flying? Nightmares of teeth falling out? Falling off a cliff? As a sleep scientist at the University of Montreal, Michelle Carr has pretty much heard it all. In Michelle’s new book Nightmare Obscura, she explores the science of dreams, nightmares – and even something called dream engineering, where people influence their own dreams while they sleep. Today on Short Wave, co-host Regina G.
A chemical found in fish could help reinvent your sunscreen
It’s been over 25 years since the FDA approved a new ingredient for sunscreen in the United States. But a molecule called gadusol found in fish and coral reefs is a promising candidate. It absorbs U.V. rays — acting like a built-in sunscreen for fish. But there’s a big hurdle if scientists want to turn gadusol into human sunscreen: They’d need to make a lot of it. A new study out this week in the
Should you be fibermaxxing? Here's what the science says
The average person eats 10-15 grams of fiber per day, according to the USDA. The problem? That’s WAY under the recommended daily amount. Fiber – a type of carb that our bodies are unable to digest – is prevalent in foods like fruits, veggies, whole grains, and beans. And it’s key for everything from feelings of fullness, to gut health, to good poop. That’s why a lot of people online are “fibermaxx
Why Swedish scientists gave salmon cocaine
A recent study caught our eye: salmon on cocaine. Or really, researchers giving salmon cocaine…for science. See, scientists know human drugs pollute aquatic environments – past studies have shown even anti-anxiety drugs can change how fish act. But illicit drugs are less studied. And Jack Brand, an aquatic ecologist at the Swedish University of Agricultural Sciences, wanted to know how illicit dru
Without this pill, lots of people would be dead
25 years ago, the FDA approved a pill that would change the way scientists treat cancer … for good. The pill was called Gleevec; it was designed specifically to treat CML, chronic myeloid leukemia, and it was one of the first targeted cancer therapies available. A quarter century after approval, it’s still being prescribed, as are second, third and fourth-generation drugs that followed in its foot
Hantavirus: the risks, the science and what you need to know
On May 2, the World Health Organization got an alarming report: People aboard a ship in the Atlantic Ocean were falling ill. The culprit is now confirmed as hantavirus, a pathogen that some rodents carry that can infect humans in rare, but often deadly, instances. Multiple passengers have died, and more people are showing symptoms. So, we’re talking to Emily Abdoler, an infectious disease doctor a
How science is taking tripping mainstream
President Trump recently signed an order to speed up the evaluation of psychedelics to treat the brain. That’s coming after decades of strict prohibition on psychedelic drug use dating back to President Nixon. So how did we go from that to a psychedelic renaissance? A look into a key institution in the world of psychedelic research may give us some clues. This episode, NPR’s brain correspondent Jo
This medical condition stumped doctors for years
One morning, Kyla Madonna Kenney woke up and her world was turned upside down: The room was spinning, she had a splitting migraine and one side of her body was shaking. Her tremors and migraine lasted for days. And for years afterwards, doctors would ask her: Did anything upset you recently? Are you stressed? Have you talked to a therapist about your anxiety? She underwent surgeries and took medic
The secret behind clownfish stripes and more fishy fascinations
We reeled in science reporter Ari Daniel for this episode who grants us three wishes in the form of three fishes. He takes us on a trip around the world to learn about how a clownfish in the western Pacific loses its stripes as it grows up just to fit in, a fat French fry of a fish that can scale a 50-foot rockface in the Democratic Republic of Congo, and the remarkable rearing of a pea-sized Poké
Coffee is complex. Can science standardize it for the better?
Ask any coffee aficionado, and they’ll tell you: A good cup is about more than the beans. The flavor is affected by lots of things – the roast and fermentation of the beans, the coarseness of the grind, the brewing temperature and even the chemicals in the water used to brew it. But there are very few quantitative ways to assess all the flavor variations. Current industry standards measure the con
NASA is practicing moonwalks. When are we going back?
After the success of Artemis II, we at Short Wave definitely have moon fever. So, we brought NPR science correspondent Nell Greenfieldboyce onto the show to talk about where we’re headed. What will future Artemis missions look like and what needs to happen next for people to be able to walk on the moon again? We find out in this latest installment of Spacing Out – with space enthusiasts Regina G B
Set up solar, or save a tree? It’s complicated
To solar or not to solar? That is the question for this latest episode of our monthly series Nature Quest. For listener Darcey Hughes, installing solar panels isn’t just about keeping her utilities free of fossil fuels – it’s also a way to become fully self-reliant and save some money each month. But there’s a catch: She might have to chop down a large, shading cedar tree. Today, we investigate: W
The mystery that led this family to get their stomachs removed
When Karyn Paringatai learned about a pattern among her family members, it changed the course of her life: A lot of people died young. As Karyn dug into her family history, she learned many Maori families, like her own, suffered from a rare form of stomach cancer called diffuse gastric cancer. Sarah Zhang recently wrote a story on this kind of cancer as a staff writer at The Atlantic. Today, she g
Why a chimp 'civil war' shows how societies collapse
In the mid-1970s, primatologist Jane Goodall witnessed something that changed her opinion of chimpanzees forever: A four-year conflict amongst the chimpanzees she was studying in Tanzania. Chimpanzees that knew each other started killing each other. It was essentially the primate equivalent of a civil war. And now, it’s happening again: Fighting within the largest known community of chimpanzees. N
Where did our moon come from?
Earth didn’t always have a moon. In the beginning of the solar system, when the planets were still forming, something happened that would change Earth’s night sky forever: The Moon was created! How did it happen? This episode, co-host Regina G. Barber searches for answers with planetary scientists. With co-host Emily Kwong, they discuss how the moon was likely made, how scientists know and what th
Eating disorder recovery in a diet culture world
Eating disorders are complicated illnesses that skyrocketed among teenagers during the COVID-19 pandemic. Pediatrician Eva Trujillo says they "literally rewire the brain," decrease brain size, and make it harder to concentrate and to regulate emotions. Malnutrition can slow the metabolism, impact bone density and even lead to cardiac arrest. But Eva says, with the right treatment, people can also
These voicemails save lives
For residents of Prek Touch, Cambodia — right on the banks of the Mekong River — flooding is a regular part of life. But as those floods worsen due to climate change, it’s getting harder to adapt. Along with other flood-prone regions throughout Southeast Asia, government officials are facing an issue: how to deliver widespread weather warnings in a timely, effective way. One solution that’s workin
The psychology behind why you dread small talk
Do you avoid small talk in the office, or with your neighbor in the elevator? If so, you might want to give it a chance. According to a study just published in the Journal of Personality and Social Psychology, even when participants were primed that a conversation would be boring, it turned out to be more interesting than they anticipated. Today on the show, we get into that, plus why scientists g
A new approach to brain health, one neuron at a time
Neuroscientist Paul Nuyujukian likens the brain to a stadium full of people. To eavesdrop on the crowd you could put a microphone in the middle of the stadium. But to understand the conversations you need to record individual people. He thinks about the brain the same way. To understand brain disease, he studies neurons—one at a time. And his insights are shedding light on a big global issue—strok
Is there still a gender gap in medical research?
When you go to the doctor’s office, your doctor has to figure out which treatment is best for you. Physicians rely on medical research and clinical trials to make sure those treatments are safe and effective. But that research has not always been inclusive, which impacts patient care. Women and people of color were only required to be included in medical trials funded by the NIH starting in 1993.
Are you pooping all wrong?
Talking about poop can be taboo, and this social norm may be hurting our health. Dr. Trisha Pasricha says around 40% of people in the U.S. have bathroom issues so bad it affects their daily lives. Pasricha, a gastroenterologist, says her patients' bathroom and bowel education ends during potty training and doesn’t continue into adulthood. This is why she wrote the book You’ve Been Pooping All Wron
Who's to blame for all this plastic?
How did plastic become so ubiquitous? The answer lies deep beneath the surface of the earth. In her new book Plastic Inc., environmental journalist Beth Gardiner lays bare the key connection between plastics and the fossil fuel companies behind them. Today, we dive into the history of the multi-billion dollar industry that brought us plastic, their plans to create even more and what could be done
Quantum physics is for everybody
Subatomic particles, gravity wells and the beginning of the universe – these are difficult and mysterious concepts that are better understood with storytelling and metaphor. That’s exactly theoretical physicist Chanda Prescod-Weinstein’s tack in the new book The Edge of Space-Time: use metaphor and wonder to bridge the gap between people’s confusion and excitement with quantum physics.In this epis
Why are bees special? We get inside a hive to find out
In a new National Geographic docuseries, viewers get a look inside a bee hive. The series is called Secrets of the Bees — and since there’s nobody we know who loves bees more than entomologist Sammy Ramsey, we brought him on the show to share some of these secrets. We cover how bees play together (yes, play!), their ability to fend off predators four-times their size and a mite wreaking havoc on h
The world is running out of helium — again
Lots of people count on helium. From MRI machines and semiconductor manufacturing to pressurizing rockets and detecting leaks, helium is used globally for much more than party balloons. So when there’s a shortage, like right now, the effect is far-reaching. But before the current shortage started, there was already a finite supply on Earth. So, today on Short Wave, we revisit our episode on the hi
Never had the flu? Scientists may know why
Scientists estimate somewhere between 5%-35% of people do not get sick from the flu despite being exposed to the virus that causes it. Now, researchers may have figured out why. The team looked at mouthwash samples from 19 healthcare workers who, despite frequent contact with infected patients, report never getting flu symptoms. Today on Short Wave, we talk about how what they found could help sci
Why is NASA going to the moon again?
NASA’s Artemis II mission is set to launch this week, which could bring humanity close to the moon for the first time since 1972. It’s a mission that’s over twenty years in the making – and even though it’s not the first venture out to the moon, it still involves a lot of firsts. If all goes to plan, the mission will bring the first woman, person of color and non-American close to the moon. But wh
Predicting spring bloom is an art and a science
Do you ever wish you could predict the future? The National Park Service in Washington D.C. does it every year when they forecast when the Capitol’s cherry blossoms will reach peak bloom. People travel from all over the world to enjoy the annual National Cherry Blossom Festival and to glimpse these fragile flowers before they are gone. On this month’s Nature Quest, we learn the ins and outs of che
Space news: Project Hail Mary, Artemis, data centers
Short Wavers, we hear your requests. You want MORE! SPACE! So this is the first installment of a new segment focusing only on space news. First, we talk about the new sci-fi film Project Hail Mary and the accuracy of the science in the movie. Then, we move on to data centers in orbit, if they are better for the environment and why even send them up into space. Finally, we round out the conversatio
What's up with recycled wastewater's PR problem?
Would you drink recycled wastewater? It could be a solution to the global water crisis. But not everyone is ready to jump onboard. They say it’s not technology that’s keeping more cities from recycling their wastewater, but psychology. Experts call this resistance “the yuck factor.” We chat with water journalist Peter Annin about some history behind water recycling – and why more cities could adop
The world’s freshwater is getting saltier. Why?
Around the world, the planet’s freshwater is getting saltier. And it’s because of people. For decades, salting roads, fertilizer run-off and evaporation driven by human-caused climate change have upped the salinity of lakes, rivers and groundwater. All that salt is detrimental to a lot of aquatic life and can be problematic for drinking water, too. But there’s still time to reverse course. In fact
The world has a groundwater problem. Can we solve it?
Groundwater is responsible for about half of the water people use globally. It’s drying up. Hayes Kelman started noticing the family farm in western Kansas was slowly getting less water around the time he was in high school. Now, as an adult and co-owner of Kelman farms, he is acutely aware that there’s a problem: the aquifer he uses to water his crops is being drained faster than it can be refill
Day Zero: When the wells run dry
In honor of World Water Day, Short Wave is exploring the ways water touches our lives. From increasing water shortages around the world, to how it’s affecting agriculture and aquifers. We’re starting with “day zero”: the day a city or place runs out of water. Cape Town, Mexico City, Chennai in India are just a few places that have come close to day zero events. Today, we talk to experts and hear f
How did these flowers evolve to survive a megadrought?
A multi-year megadrought in the Western U.S. has claimed untold populations of wild plants. Amid the conditions, some have survived. Scientists have produced a stunningly complete picture about how populations of one particular flower – the scarlet monkeyflower – made it through. In a new study published in the journal Science, a team of scientists spent decades studying and sampling select popula
A dietitian and doctor review RFK Jr's new food pyramid
The new food pyramid was released earlier this year. It emphasizes protein, full-fat dairy and what Health and Human Services Secretary Robert F. Kennedy Jr. calls “healthy fats.” These guidelines influence the standards for school lunches, food labeling and programs like SNAP. Today on the show, Short Wave co-host Emily Kwong chats with registered dietitian nutritionist Shana Spence, and Dr. Sar
‘Black rain’ in Iran and the environmental cost of war
US-Israeli airstrikes on oil depots culminated in ‘black rain’ in Iran early last week – a phenomenon usually caused by large amounts of soot, carbon and other pollutants in the air. Usually, rain leaves the atmosphere cleaner than it was before. But in this case, the rain left Tehran’s residents with sore throats and burning eyes. Oily, sooty residue was all over the city. So, we talked to an env
This is your brain on pleasure (even the guilty kind)
It’s likely you have at least one “guilty pleasure.” Maybe it’s romance novels. Or reality TV… Playing video games… or getting swept into obscure corners of TikTok. Neuroscientists say the pleasure response helps us survive as a species. So why do we feel embarrassed by some of the things we love the most? Even if you don't have these negative emotions, experiencing – and studying – pleasure is no
An icy mystery: What are lake stars?
When producer Berly McCoy was out on her local frozen lake, she saw something she'd never seen before. There were dark spidery, star-shaped patterns in the ice and they freaked her out. So, we called an expert to find out more about them. In today’s episode, geophysicist Victor Tsai tells us about lake stars and how he became the first person to scientifically prove how they form. Plus, he explain
We saved gray whales from extinction. Why are so many dying again?
In 1999 hundreds of gray whales washed up along the west coast of North America. More in 2000. They lost an estimated 25% of their population. But then the whale population recovered and people moved on. Until it happened again in 2019. And 2020, and 2021. It’s still happening today. Host Regina G. Barber dives into this mystery with marine ecologist Joshua Stewart, who explains how scientists lik
Sibling order may affect sexuality and identity
Today, guest host Selena Simmons-Duffin is exploring a detail very personal to her: How the number of older brothers a person has can influence their sexuality.Scientific research on sexuality has a dark history, with long-lasting harmful effects on queer communities. Much of the early research has also been debunked over time. But not this "fraternal birth order effect." The fact that a person's
What crocodile bones teach us about dinosaurs
Paleontologists have often determined how old a dinosaur was by counting the growth rings in its bones. Just like with trees, it was thought that each ring corresponded to a single year of age. But researchers who studied crocodiles at an outdoor recreation center near Cape Town appear to have poked a hole in that approach. In the crocodiles, which are some of the closest living relatives of dinos
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World of Prank Calls
TechnoSnobCast
Snoop Dogg - Flash Biográfico
The Moral Support Podcast
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پلی لیست | PlayList
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رختکن بازندهها
Deadline: White House
