

Unexpected Elements
BBC World Service
The news you know, the science you don’t. Unexpected Elements looks beyond everyday narratives to discover a goldmine of scientific stories and connections from around the globe. From Afronauts, to why we argue, to a deep dive on animal lifespans: see the world in a new way.
Episodes
Mentioned books

Aug 18, 2025 • 49min
Why do we follow trends?
What's got rabbit-like ears, huge eyes, nine teeth and a demonic grin? It’s Labubu! These ugly-cute toys have gone viral online, largely thanks to social media’s trending machine. Their fame was previously limited to China and parts of Asia, but since 2024 their popularity has grown and the dolls can now be purchased in more than 30 countries round the world. This week, the global demand for Labubu inspired us to play around with trend-based science. First up, we hear how the special sauce behind TikTok’s algorithm helps drive viral trends. Next, we find out that humans are not the only ones that love a fad – chimpanzees are susceptible to them too!We then discover what connects the hugely popular Beanie Baby toys of the 1990s with modern CubeSat exploration, thanks to aerospace engineer Professor James Cutler, from the University of Michigan. Plus, we discuss a weird object thousands of light-years away that could lead to new physics.And why do we find songs annoying after multiple listens?All that, plus many more Unexpected Elements. Presenter: Marnie Chesterton, with Godfred Boafo and Edd Gent
Producers: Alice Lipscombe-Southwell, with Imaan Moin, Lucy Davies and Margaret Sessa Hawkins

Aug 8, 2025 • 50min
Floods, mangroves and rampaging tractors
This week, floods have hit the global headlines. First up, we delve into the various reasons why floods form. After learning about the causes of floods, we discover a nature-based solution in the form of mangrove forests. Laura Michie from the Mangrove Action Project tells us why these ecosystems are important, and how they can protect coastal zones.We also find out that humans have moved so much water around the planet that we’ve shifted the location of the geographic North Pole. Plus, a rare flooding event is currently taking place in the Australian Outback, awakening an ecosystem after years of dormancy. And what could happen when hackers take control of tractors?All that, plus many more Unexpected Elements. Presenter: Marnie Chesterton, with Andrada Fiscutean and Sandy Ong
Producers: Alice Lipscombe-Southwell, with Lucy Davies, Debbie Kilbride and Margaret Sessa Hawkins

Aug 1, 2025 • 49min
Traffic science
Robert Rock, a landscape architect, leads the innovative Wallace Annenberg Wildlife Crossing project in California. He shares insights on urban traffic dynamics and humorous anecdotes about congestion's puzzling causes. The conversation intriguingly compares human traffic to ant behavior and touches on eco-friendly travel initiatives. They also discuss weather-related traffic jams and even the science behind tangled cables, merging psychology and physics in a lighthearted way that draws parallels between everyday frustrations and complex environmental systems.

Jul 28, 2025 • 3min
Trailer: 13 Minutes Presents: The Space Shuttle
The epic space story of a sci-fi dream that changed spaceflight forever. Told by the Nasa astronauts and team who made it happen. Our multi-award-winning podcast is back, hosted by space scientist Maggie Aderin-Pocock. She tells the story of triumph and tragedy - of a dream that revolutionised modern space travel forever.You can listen to the trailer here. To hear episodes, search for 13 Minutes Presents: The Space Shuttle, wherever you get your BBC podcasts.
13 Minutes Presents: The Space Shuttle is a BBC Audio Science Unit production for the BBC World Service.
Theme music by Hans Zimmer and Christian Lundberg, and produced by Russell Emanuel, for Bleeding Fingers Music.
Archive:
Mission audio and oral histories, Nasa History Office.

26 snips
Jul 25, 2025 • 49min
The science of ageing
Joining the discussion is Thomas Boothby, a molecular biologist from the University of Wyoming, who specializes in the survival of tardigrades in extreme environments. He shares fascinating insights about these tiny creatures and their remarkable abilities to endure harsh conditions and pause aging. The conversation also touches on cognitive aging, exploring how brain function changes over the decades, and examines the secrets of longevity found in Blue Zones around the world. Plus, they delve into myths about aging, combining science with humor.

Jul 18, 2025 • 50min
How dust affects the world
This week, a new report into the dangers that sand and dust storms pose to the world's health and economy has inspired us to delve in the science of dust.First, we look at the report by the World Meteorological Organisation and hear about what can be done to mitigate the dangers of dust. We also find out the surprising way in which the Sahara is keeping the Amazon rainforest well-fed, and Derek Fabel from the University of Glasgow tells us how dust can help us to determine the age of glaciers.Plus, the dusty maths that took 15 years to solve, and the musician who swapped jazz for space dust.All that, and many more Unexpected Elements.Presenter: Caroline Steel
Producers: Margaret Sessa-Hawkins with Alice Lipscombe-Southwell, Minnie Harrop, Lucy Davies, and Robbie Wojciechowski

Jul 11, 2025 • 50min
Sharks, albatrosses, the Jaws theme and fishing
Shark Awareness Day on 14th July sends us on a deep dive into marine biology.First, we learn how shark-inspired materials could help make aeroplane flights more efficient.Next, we hear about the fish that don’t flee from sharks... instead, they seek them out to help them hunt. Bob Duke, Meyerson Professor of Music and Human Learning at the University of Texas, Austin, joins us in the studio to reveal how and why the iconic Jaws music taps into our psychology to leave us trembling. We also hear about a couple of tiny islands in the Southern Ocean, on which an unexpected predator is wreaking havoc.Plus, why a tiny fish is being ground up and fed to other fish. All that, plus many more Unexpected Elements.
Presenter: Marnie Chesterton, with Leonie Joubert and Christine Yohannes
Producer: Alice Lipscombe-Southwell, Imaan Moin, Minnie Harrop and Margaret Sessa Hawkins

Jul 4, 2025 • 49min
Cargo ships, chemical spills and caribou
The X-Press Pearl shipping disaster takes us on a voyage through shipping-related science. First, we learn about how pollution from the X-Press Pearl explosion impacted the foundation of the marine food web – plankton. We also hear about an innovative system that can help slash the shipping industry’s greenhouse gas emissions. And we take a short trip in a time-machine back to the Stone Age, where biological anthropologist Professor Yousuke Kaifu from the University of Tokyo explains what it takes to recreate a Palaeolithic voyage from Taiwan to the Ryukyu Archipelago. We also look at how artificial intelligence could help Canadian caribou cross sea ice, the science of lightning and thunder, and the tricky disputes around shipwrecks and treasure. All that, plus many more Unexpected Elements.
Presenter: Marnie Chesterton, with Meral Jamal and Godfred Boafo
Producer: Alice Lipscombe-Southwell, Minnie Harrop and Imaan Moin

Jun 27, 2025 • 49min
A roarsome episode
This week, Enigmacursor mollyborthwickae has been unveiled at London's Natural History Museum. This newly described herbivorous dinosaur has inspired us to take a stomp through the science of ancient animals, mass extinctions and fossils.First up, we hear about a shepherd who recently found a South African dinosaur, which has helped shed light on the period between the Triassic and Jurassic. We then take a look at some new theories that suggest the mass extinctions that wiped out ancient creatures may not have been as massive as we thought. But one extinction definitely is currently underway, according to ecologist Professor Dave Goulson. And that’s the mass extinction of insects. Plus, we find out the latest theory of why the Tyrannosaurus rex had such tiny arms, and we meet the rat ancestors that munched on dinosaurs. All that, plus many more Unexpected Elements.
Presenter: Marnie Chesterton, with Candice Bailey and Camilla Mota
Producer: Margaret Sessa Hawkins, with Alice Lipscombe-Southwell and Minnie Harrop

Jun 20, 2025 • 49min
Some really cool science
This week, the Florida Panthers beat the Edmonton Oilers at ice hockey’s Stanley Cup championship, which sent us skating into ice-related science.First up, we hear about an ancient ice skate that’s been unearthed in Prerov, Czech Republic, which sends us pondering about the physics of ice-skating. We then discover why licking a flagpole on a chilly day is a bad idea, before delving into the science of cryopreservation. Next up, we speak to Dr Mark Drinkwater of the European Space Agency, who reveals how satellites can help us monitor and better understand our planet’s melting ice sheets. Plus, what do you do if you want to play ice hockey but you live near the equator? All that, plus many more Unexpected Elements.
Presenter: Marnie Chesterton, with Chhavi Sachdev and Sandy Ong
Producer: Alice Lipscombe-Southwell, with Margaret Sessa Hawkins and Minnie Harrop