Category: ScienceNews

In this episode, you're invited to the fermentation party! Join us as we learn about the funk-filled process behind making sauerkraut, sourdough and sour beer. Plus, no fermentation episode is complete without a lil history of our boy, yeast.

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CrowdScience listeners David and Tatiana have long been captivated by an unusual dinner table discussion: the peculiar change they’ve noticed over the past 16 years in the sunlight streaming through their bedroom window in Ostend, Belgium. They’re convinced that the room has not only become sunnier but that the actual angle of sunlight has shifted.

Intrigued by their observations, we head to Ostend. Our mission: to investigate three of their theories, enlisting expert help along the way.

Theory 1 – A celestial anomaly? René Oudmaijer at the Royal Observatory of Belgium considers whether our shifting position in the solar system might explain the change.

Theory 2 – Movement in the Earth’s crust? Alejandra Tovar from the Geological Survey of Belgium examines tectonic data to see if the Earth’s crust is moving enough to alter the angle of sunlight.

Theory 3 – Subsidence? Structural engineer Kath Hannigan helps us inspect the building for signs that it may be sinking or twisting.

And we explore one final theory of our own, enlisting memory expert Julia Shaw to examine whether it could all be a trick of the mind. Will the team crack the case?

Presenter: Caroline Steel Producer: Harrison Lewis Editor: Cathy Edwards Production co-ordinator: Ishmael Soriano Studio Manager: Sarah Hockley

(Photo: CrowdScience listeners David and Tatiana standing in front of a window in their house)

Russia has fined Google more than two undecillion rubles, which is more than 20 decillion dollars. How much you ask? 20 decillions is a 20 with 33 zeros behind it, more money than there is in the entire world!

This unpayable fine inspired us to look at extremely large numbers, from the amount of cells in our body, to infinity hotels and beyond. Plus, two-time world memory champion Jonas von Essen teaches us how to memorise these supermassive numbers.

Also, we unpick a dubious influential biodiversity statistic that has no basis whatsoever, and we look at the scientific tools of ghost hunting.

Plus, to round it off, presenter Marnie looks at a sport with more possible moves than there are atoms in the Universe. Can you guess what it is?

Presenter: Marnie Chesterton with Tristan Ahtone and Candice Bailey. Producer: Florian Bohr with Alice Lipscombe-Southwell and Imaan Moin. Sound engineer: Rhys Morris

A pivotal week in Corey Gray's life began with a powwow in Alberta and culminated with a piece of history: The first-ever detection of gravitational waves from the collision of two neutron stars. Corey was on the graveyard shift at LIGO, the Laser Interferometer Gravitational-Wave Observatory in Hanford, Washington, when the historic signal came. This episode, Corey talks about the discovery, the "Gravitational Wave Grass Dance Special" that preceded it and how he got his Blackfoot name. (encore)

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Many coronaviruses exist in nature that we don’t know much about. We don’t even know how and whether most of them might bind to human cells. Research published in Nature, by scientists at Wuhan and Washington Universities, describes a new way of designing novel receptor sites on cell cultures so that many types of coronavirus may now be cultured and studied to ascertain their risk to humans. Cambridge virologist Ravindra Gupta, who is not one of the authors, gives Science in Action his take on the risks versus the reward.

Dotted around the remains of Pompeii, visitors are often struck by the plaster casts of some of the victims’ dying moments. During recent restoration of several of these casts, scientists were able to extract DNA samples from bones which had previously been enveloped by plaster since their initial discovery. As Alissa Mittnik of the Max Planck Institute for Evolutionary Anthropology describes, some of the findings confound our previous narratives about their lives, relationships, and even their genders.

Rozenn Pineau, a plant evolutionary geneticist at the University of Chicago in Illinois, has been investigating the unique evolutionary history of the world's oldest (and biggest) tree - "Pando".

And finally, the oldest known tadpole is described from a 160 million year old Argentinian fossil by biologist Mariana Chuliver.

Presented by Roland Pease Produced by Alex Mansfield, with Eliane Glaser Production Coordination by Jana Bennett-Holesworth

(Image: Illustration of Covid-19 coronavirus binding to human cell. Credit: Kateryna Kon via Getty Images)

In North-Central New Jersey, there is a backyard teeming with around 200 turtles. Many of these shelled creatures have been rescued from the smuggling trade and are now being nursed back to health in order to hopefully be returned to the wild. Science reporter Ari Daniel joins host Regina G. Barber to tell the story behind one man's efforts to care for these turtles and to ensure they have a chance at another (better) life.

Read more of Ari's reporting.

Have an idea for a future episode? We'd love to know — email us at shortwave@npr.org!

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It's Election Day in the United States. Across the nation, millions of ballots are being cast. But what would happen if the rules of our electoral system were changed? Certain states are about to find out. This year, several places have alternative voting systems up for consideration on their ballots, and those systems could set an example for voting reform throughout the rest of the country. Short Wave producer Hannah Chinn and host Emily Kwong dive into three voting methods that are representative of those systems: Where they've been implemented, how they work, and what they might mean for elections in the future.

What to hear more about the math powering our lives? Email us at shortwave@npr.org and we might cover your idea on a future episode!

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As an investigative journalist, Julia Ebner had the freedom to do something she freely admits that as an academic (the hat she currently wears as postdoctoral researcher at the Calleva Centre for Evolution and Human Sciences at the University of Oxford) she have been proscribed from doing - posing as a recruit to study violent extremist groups. That, as you might expect, gave her special insight into how these groups attract new blood, and on the basis of that work, as well as more traditional research for groups such as the Quilliam Foundation and the Institute for Strategic Dialogue, she has been hosted by the United Nations, national legislators, intelligence agencies and Big Tech.

In this Social Science Bites podcast, Ebner details some of the mechanics of her undercover research for host David Edmonds before discussing the prevalence and characteristics of violent extremist groups. Given the variety of ways governments tally these groups and the groups' own amorphousness in an online age, determining whether such groups are on the rise - which seems to be a perennial fear - proves devilishly difficult to determine. "I would say," Ebner concedes, "it often comes and goes in waves, but now we are seeing a very strong wave of very young people, including minors, radicalizing towards violence."

That radicalization proves remarkably similar regardless of ideology, Ebner notes. Plus, it's not straightforward determining who might be open to recruitment. "Based on my research, I would say that everyone is potentially susceptible to radicalization, especially in vulnerable moments in our lives, and everyone has them."

Ebner serves up that potential universality in a different context to close the podcast. It's what keeps her up at night: "I think the mainstreaming of some of the extreme concepts and ideas and language that I used to observe only in the darkest corners of the internet, but that is now being heard in parliaments, that is now being seen in large social media channels of influencers or voiced by politicians."

Given her journalistic chops, it is no surprise that Ebner has written extensively on extremism in a series of well received books. The Rage: The Vicious Circle of Islamist and Far-Right Extremism, received the Bruno Kreisky Award for the Political Book of the Year 2018; Going Dark: The Secret Social Lives of Extremists was a Telegraph Book of the Year 2020 and Germany publishing's Wissenschaftsbuch des Jahres 2020 ("Science Book of the Year") Prise as well as the Dr Caspar Einem Prize from the Association of Social Democratic Academics; and Going Mainstream: How Extremists Are Taking Over, was published in 2023.

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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Fungi are a mysterious and understudied life form. And to add to the intrigue, some of them actually glow in the dark. This phenomenon has sparked CrowdScience listener Derek's curiosity, and he's asked us to investigate.

Presenter Caroline Steel gets on the case. This is just one example of the natural wonder that is bioluminescence – living organisms that glow. How do they produce their light, and is there any reason for it? Caroline visits a bioluminescent bay in Puerto Rico, and Dr Brenda Soler-Figueroa explains what makes it sparkle.

But it turns out there are many different explanations for why living things glow. Fungi, which listener Derek is particularly interested in, are neither plants nor animals, but an entirely different kingdom of life that we know much less about. Professor Katie Field takes on the task of trying to grow us some bioluminescent mushrooms, while Prof Cassius Stevani explains how – and importantly, why – they glow.

And finally – could we ever harness the power of bioluminescence to our advantage in the future?

Presenter: Caroline Steel Producer: Hannah Fisher Editor: Cathy Edwards Production co-ordinator: Ishmael Soriano Studio Manager: Neva Missirian

(Photo: Omphalotus nidiformis, or ghost fungus, Penrose, NSW, Australia Credit: Louise Docker Sydney Australia via Getty Images)