BBC World Service
Unexpected Elements
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.
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Episodes
Walk the line 09.10.2026 49:30
Estonian athlete Jaan Roose recently completed a jaw-dropping slackline display, performing daredevil tricks 120 metres above the streets of central Seoul, South Korea. This exciting event by a world champion slackliner got the Unexpected Elements team thinking about risk-taking, acrobatics and skyscrapers. First up, we discover that there may be anatomical differences in the brains of people who...
Rogue Agents 02.10.2026 49:30
This week’s news of an AI agent managing to hack into an Australian government website has the Unexpected Elements team exploring the sneaky science of infiltration. Marnie Chesterton is joined by science journalists Paul Adepoju and Andrada Fiscutean to discover how South African drongo birds have developed an ingenious technique to protect their nest from cuckoo eggs, and to hear about the unusu...
An identity crisis 25.09.2026 49:31
When a NATO fighter jet was sent to investigate what appeared to be a suspicious drone near Vilnius airport, the culprit turned out to be something rather less threatening: a flock of birds. Inspired by this case of mistaken identity, the Unexpected Elements team explores the science of getting things wrong. We discover why our brains are so eager to spot faces in everyday objects, from clouds to...
A distorted view 18.09.2026 49:31
With the United Nations encouraging wider use of the Equal Earth map, a projection designed to better represent the true size of Earth's landmasses, the Unexpected Elements team have been thinking about distortion and the surprising new ways we can see the world and beyond. We discover that every city's subway system has its own unique microbial fingerprint, so distinctive that researchers can ide...
The phizz-whizzing science of Roald Dahl 11.09.2026 49:31
Roald Dahl Day is celebrated each year on 13 September. Dahl gave us much-loved children’s books like Matilda, The BFG and Charlie and the Chocolate Factory, which have captivated kids for generations. Dahl is also a controversial figure, and made anti-semitic remarks that his family have since apologised for. We explore the separation of art and artist, and go looking for the science hidden in Da...
The show must go on 04.09.2026 49:31
The 80th birthday celebrations of the late, great Queen frontman Freddie Mercury have us marvelling at mercury at an elemental level: as a killer, a cure and more. First, we hear about how to make a telescope mirror out of a spinning bowl of liquid mercury. Then we hear about killer queens; it’s a gruesome tale of pheromone-induced ant warfare. Next, Freddie’s rare condition that caused him to hav...
A very dry episode 28.08.2026 49:30
Vast swathes of Europe and Asia are experiencing drought conditions, thanks to relentless heatwaves and lack of rain. This week, we find out why drought conditions could unexpectedly lead to an increase in water-borne disease. Next up, we take a trip to Lake Malawi to discover why a tiny fly could help us rewrite the science of insects. Also on the show, we’re joined by Professor Dan Parsons from...
Fashionably late 21.08.2026 49:31
News of an Australian library book finally finding its way home 150 years after it was borrowed has the Unexpected Elements team thinking about things that get forgotten, filed away or simply turn up much later than expected. We start with the story of a meteorite from Mars that spent millions of years travelling through space before ending up in a university drawer. Then, we investigate why scien...
Light entertainment 14.08.2026 49:30
As Europe experiences its first total solar eclipse in almost 30 years this week, Unexpected Elements investigates the surprising science that emerges when sunlight is blocked out. We travel to the forests of Italy, where we investigate whether trees can communicate their eclipse plans to each other. We learn about an ambitious scientific plan to launch a wall of bubbles the size of Brazil into ou...
Someone's always watching 07.08.2026 49:30
The UK's Royal Society for the Protection of Birds has found that birdwatching is the second-fastest growing hobby amongst Gen Z with 750,000 of them regularly venturing into the outdoors to spot some of our feathered friends. Inspired by this new appreciation for an old pastime, the Unexpected Elements team are on the lookout for some birdwatching science. First, we watch birds, but did you know...
Down The Rabbit Hole 31.07.2026 49:30
75 years ago, Walt Disney's Alice in Wonderland hit our screens, welcoming us into a technicolour, topsy-turvy world of eccentric characters – including the Mad Hatter, the Cheshire Cat, the Queen of Hearts, the White Rabbit and many more. On Unexpected Elements, we're tumbling down the rabbit hole to uncover the strange and surprising science hidden within the classic story. We’ll find out how bi...
Bald caps, sparrow raps and lightning claps 24.07.2026 49:30
If you were lucky enough to be at rapper Pitbull's recent concert in Hyde Park in London, you would have been greeted by a sea of bald caps. A Guiness World record-breaking sea of 22,141 bald caps. And, in honour of this incredible feat, the Unexpected Elements team are exploring some science. First, is hair the secret to healing? We find out why trading fur for sweat may have had unexpected conse...
A scientific odyssey 17.07.2026 50:00
As the film adaptation of the Odyssey bursts onto screens around the world this week, here at Unexpected Elements we’re undertaking our own epic journey through science – all inspired by the ancient Greek epic. First, we discover the tiny virus that’s using its own Trojan Horse to sneak into cells it wouldn’t usually be able to infect. Then, we hear about the daring 8000km voyage undertaken by igu...
Everyone needs a hero 10.07.2026 49:30
A mysterious vigilante in Mexico nicknamed “Batman” has inspired the Unexpected Elements team to investigate the science of superheroes. First up, we explore whether a Batman’s presence can actually change human behaviour. One unusual psychology experiment suggests that people may be more likely to perform acts of kindness when a caped crusader appears nearby. Then we discover a real human superpo...
Stuck in a cycle 03.07.2026 49:30
Pakistan has recently announced that they plan to abolish the 18% sales tax on menstrual products like pads or tampons. UN Women has welcomed the decision, saying that when these products become more affordable it means more girls and women stay in school and the workforce. For the Unexpected Elements team, the news has led us towards scientific stories of menstruation and different kinds of cycle...
Dividing lines 26.06.2026 49:29
This week South Korea announced they will be adjusting the Civilian Controlled Zone that borders the demilitarised area between North and South Korea. The reshuffle will allow thousands of civilians to be able to move with more freedoms, but for the Unexpected Elements team, it’s sparked a conversation about scientific borders, boundaries, lines and barriers. First up, a look at the Wallace Line,...
Anyone for chips? 19.06.2026 49:30
The spiralling cost and short supply of microchips – something the tech journalists have dubbed ‘RAMageddon’ – has the Unexpected Elements team investigating all things chip-related. We start things off by finding out about a mini cervix-on-a-chip and how this could help us better understand premature birth. We then feel a little salty when we discover that chips (also known as fries) may create c...
The beautiful game 12.06.2026 49:30
As the Fifa Men’s World Cup kicks off this week in the United States, Mexico, and Canada, football fever is everywhere – and this has the Unexpected Elements team exploring all things football. First, we discover how it took eight years and 170 experiments for scientists to create the perfect grass pitch. Then, why a football is not really a ball… it’s a truncated icosahedron. We discuss how this...
Science bears fruit 05.06.2026 51:37
Long live the king – of mangoes! In India the famed ‘king of mangoes’, the Alphonso mango, is in drastically short supply after a particularly bad bout of adverse weather. Inspired by the mango’s plight, the Unexpected Elements team takes a look at what fruit science can bear. First, from the ‘king of mangoes’ to the ‘king of fruits’, we hear how the infamously stinky durian could be used to charg...
Celebrating science on Africa Day 29.05.2026 49:30
How do you translate the latest science work across the 2000 different languages spoken around the African continent? And have you heard of sky mountain? Africa Day has the Unexpected Elements team taking a deep dive into a range of unexpected stories from across the continent. The day is celebrated every year to mark the establishment of the African Union in 1963. In the Turkana region of norther...
Unexpected enhancements 22.05.2026 49:30
Have you ever wondered what happen to salmon when too much cocaine seeps into their rivers? Inspired by the Enhanced Games, we lookat unexpected areas of performance enhancement. Peptides are making a splash in influencer circles, but what is the science? Plus, we hear from Prof David Putrino, who is making sure the athletes at the Enhanced Games are staying safe. He shares what we can learn from...
Hantavirus outbreak and what’s in a name 15.05.2026 49:30
An outbreak of hantavirus on the MV Hondius cruise ship has us looking at the unexpected science around the disease. First up, why is this outbreak such an unusual occurrence? Then, what's in a name? We look at how diseases are named, and why the system has sometimes been problematic. Also, the mysterious case of medicine disappearing from the quarantine tanks at an aquarium. We speak to the exper...
One hundred years of Sir David Attenborough 08.05.2026 49:30
Sir David Attenborough is arguably the world’s favourite broadcaster, and this week he’s blowing out the candles on his 100th birthday cake. Inspired by his significant birthday, we decided to uncover the biology behind centenarians. What are Sir David’s secrets? Speaking of ageing, we then find out about a little jellyfish that never gets old. Could it help us unlock immortality? Next up, climb a...
The soaring price of condoms 01.05.2026 49:32
The blockade on the strait of Hormuz has led to an unexpected consequence – condom prices are set to increase by up to 30 percent! This has us delving into all things contraception, starting with koala hormone implants, the lengthy process of providing birth control to elephants, and a microplastics mystery. Then, we investigate the elusive male contraceptive – why is it taking so long to develop,...
Chernobyl: 40 years later 24.04.2026 49:30
On 26th April 1986, Reactor 4 at the Chernobyl nuclear power plant in Ukraine exploded, releasing vast amounts of radiation. Now, 40 years later, it remains the worst nuclear accident in history. Using the Chernobyl anniversary as a starting point, this week the Unexpected Elements team find out about the weird life thriving at the site of the nuclear reactor. Next up, we discover how radioactive...
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