For years, solar power at home was mostly limited to people who owned their rooftops and could afford the steep upfront costs. But now, a new generation of small, affordable systems — often called "plug-in" solar — are making clean energy more accessible. Already widespread in Germany, the movement is gaining momentum in the United States. Laura Klivans of PBS member station KQED reports. PBS News is supported by - https://www.pbs.org/newshour/about/funders. Hosted on Acast. See acast.com/privacy
Can we turn the world’s deserts green? CrowdScience listener Youcef is captivated by the idea of bringing water back to Earth’s driest landscapes. With sea levels rising and huge stretches of land drying out each year, he wonders whether redirecting seawater inland could offer a solution to both problems. Presenter Alex Lathbridge sets out to investigate… starting with a kettle of salty water.
Alex speaks with scientists about how deserts form, and how human actions like overgrazing can tip a fragile grassland into a barren landscape. He learns how the brightness of bare sand affects local weather, reducing cloud formation and rainfall. Researcher Yan Li reveals how huge solar and wind farms could darken and roughen the Sahara’s surface enough to double its rainfall, potentially kickstarting a self-reinforcing cycle of vegetation and moisture.
But what about deserts where clouds already drift overhead? In the Atacama – one of the driest places on Earth – geographer Virginia Carter shows how fog harvesting nets can coax litres of fresh water from the air.
Alex also investigates desalination, where professor Chris Sansom is trying to harness solar power to remove the salt from seawater without burning vast amounts of fossil fuels. It’s promising, but can it reduce the impact of rising sea levels? And what do you do with all the salt that’s left over?
Climate scientist Alan Condron proposes an even wilder idea: towing kilometre-sized icebergs from Antarctica to parched nations. His models show it might be possible, but the logistics verge on science fiction.
Finally, plant scientist Zinnia Gonzalez Carranza warns that greening deserts isn’t just about adding water. Introducing new species, even hardy ones like mesquite, can trigger ecological chaos and harm the very communities who depend on these landscapes.
Presenter: Alex Lathbridge
Producer: Sam Baker
Editor: Ben Motley
Photo: Palm trees - stock photo Credit: danymages via Getty Images)
A teddy bear launched into the upper atmosphere as part of a school science project has gone missing! Inspired by this story, the Unexpected Elements team look into how bears could help improve astronauts’ health on long-term space flights. Next, how has a US Air Force site delivered an unexpected conservation win for an endangered species?
We’re then joined by Justin Gregg, a professor of animal behaviour and cognition. He reveals why we anthropomorphise cuddly toys – such as teddy bears – and why this isn’t necessarily a bad thing.
We meet Alan Turing’s teddy bear, before finding out why it’s good to get lost.
All that, plus many more Unexpected Elements.
Presenter: Marnie Chesterton, with Andrada Fiscutean and Chhavi Sachdev
Producers: Margaret Sessa-Hawkins, with Alice Lipscombe-Southwell, Alice McKee and Robbie Wojciechowski
An estimated 5-10% of the U.S. population experiences a disorder with their TMJ, the joint that connects their jaw to their skull. The good news? Relief is possible. The secret? Go see your dentist. Today on the show, Emily talks with Justin Richer, an oral surgeon, about the diagnosis and treatment of TMJ disorders.
Got a question about your teeth or dentistry? Email us at shortwave@npr.org.
Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave.
Electricity bills are on track to rise an average of 8 percent nationwide by 2030 according to a June analysis from Carnegie Mellon University and North Carolina State University. The culprits? Data centers and cryptocurrency mining. Bills could rise as much as 25 percent in places like Virginia. Science writer Dan Charles explains why electric utilities are adding the cost of data center buildings to their customers’ bills while the data companies pay nothing upfront.
The comet 3I/ATLAS is taking a long holiday journey this year. It’s visiting from another solar system altogether. Those interstellar origins have the Internet rumor mill questioning whether 3I/ATLAS came from aliens. Co-hosts Emily Kwong and Regina G. Barber dive into that, plus what it and other interstellar comets can tell us about planets beyond our solar system.
Read more of NPR’s coverage of 3I/ATLAS. Also, if you liked this episode, check out our episodes on:
What does your accent – and yes, every speaker has one – say about you? Or perhaps the better question is, what do others hear in your accent? These are the sorts of questions that Devyani Sharma, a professor of language and communication at Oxford's Worcester College, asks every day, especially about the many English speakers around the world.
In this Social Science Bites podcast, Sharma takes a deep dive into the accents of Britain, where accents have famously been used as markers of social status for years. As she tells interviewer David Edmonds, "the UK stands out as a country that's organized its whole social system around accent for a very long time."
As she details for Edmonds, "Interestingly, just a reminder that 'you might be relying on accent as a shortcut and please don't' was enough to change recruiters' behavior. It doesn't always happen with gender and race anymore, and my sense is that's because the message has been saturated. People are annoyed to be reminded before doing a recruiting task, but they haven't thought as much about how much they use accent when judging people."
Prediabetes is common in the U.S. — around 1 in 3 people have it. And many people may not know they have it. But last year, the FDA approved the first over-the-counter continuous glucose monitor. Since then, more people without diabetes have started checking their blood glucose levels. Diabetologist and University of California, San Francisco professor of medicine Dr. Sarah Kim shares the science behind blood glucose with host Emily Kwong.
Check out more of NPR’s coverage about continuous glucose monitors.
Interested in more science of the human body? Email us your question at shortwave@npr.org.
Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave.
When listener Sakura’s husband came home from his morning walk in Cambridgeshire, UK, he told her about a massive rainbow he’d seen. But when he showed her a picture, she didn’t think it was particularly large. So how big is a rainbow really? Are they always the same size? And if some are bigger than others, is there a limit?
To find the answers, presenter Marnie Chesterton meets independent rainbow expert Philip Laven in a pitch-black studio to simulate how a rainbow is formed. He demonstrates how they are created by sunlight, reflecting and refracting in millions of little water droplets.
But what does that mean for their size? Raymond Lee, retired professor from the US Naval academy, says that rainbows are not objects and don’t have a linear size, just a specific angular size that’s relative to the person seeing it. But Marnie doesn’t give up so easily – some rainbows still look bigger than others.
In her journey to discover other ways to size up a rainbow, Marnie hears from Australian aerial photographer Colin Leonhardt who stunned the world with a beautiful picture. Next, assistant professor Ping Wah Li from The Chinese University of Hong Kong explains why it’s possible to come across more than one rainbow at a time.
And finally, atmospheric scientist Harald Edens shares another way to consider size, as well as how much he struggles to explain the complexity of rainbows to his four-year old daughter.
Presenter: Marnie Chesterton
Producer: Florian Bohr
Editor: Ben Motley
Photo: Rainbow of Dreams - stock photo stock photo Credit: Laurent Fox via Getty Images)
The Portrait of Elisabeth Lederer by Gustav Klimt has recently sold for $236m, making it the second-most expensive artwork ever sold at auction.
Inspired by this headline, the Unexpected Elements team delve into the story of how microbiology may have influenced Klimt’s work.
Speaking of microbiology, we find out that bacteria could help restore frescoes to their former glory.
We also get on the line with Dr Siyakha Mguni, an archaeologist and senior lecturer at the University of Cape Town, who tells us about ancient artworks far older than anything Klimt ever painted.
Plus, the world’s biggest spider’s web, and why mosquitoes are impressive 3D printers.
All that, plus many more Unexpected Elements.
Presenter: Marnie Chesterton, with Andrada Fiscutean and Edd Gent
Producers: Alice Lipscombe-Southwell, with Margaret Sessa Hawkins, Alice McKee, Lucy Davies and Robbie Wojciechowski
