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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.


Unexpected Elements

China’s ambitious underwater mapping operation takes us on a voyage into the depths of ocean and map science.

We look at what a network of underwater microphones can tell us about underwater geography, noisy ships, and whale conversations, and how it took nearly 300 researchers working together to map 140 000 neurons in a fruit fly’s brain.

Then, we are joined by biogeochemist and author Karen Lloyd, who tells us about the long-lived microbes living deep in the crust below the sea floor, how they survive for 100 000 years, and what their mysterious existence tells us about life and evolution. 

And forget sunken treasures – we will talk about the valuable, potato-sized mineral nodules that grow on the sea floor, and the pros, cons and current legality of mining them. Plus – how dolphins can help us track down abandoned undersea explosives.

All that and even more unexpected elements.

Presenter: Marnie Chesterton, with Katie Silver and Tristan Ahtone 
Producers: Ella Hubber, with Lucy Davies and Georgia Christie

Putting science on the map

Japanese pedestrians have been forcefully colliding with each other in a spate of butsukari otoko – or ‘bumping man’ – incidents and the Unexpected Elements team has been inspired to investigate some bumpy science.

First, what does your heart desire? Well, at a cellular level, the perfect match! We hear how your heart is built by cells going speed dating. Then, we discuss how birds avoid in-flock collisions, and we learn all about mesmerising murmurations.

Next, we’re joined by science journalist and author Robin George Andrews, who tells us about NASA’s mission to avoid a city-killing disaster by bumping into an asteroid before it can bump into us.

Also, a colourful question about migraines, a surprising new treatment for them, and the scientists who took antimatter for a test drive.

All that, plus many more Unexpected Elements.

Presenter: Marnie Chesterton
Producers: Sophie Ormiston, with Ella Hubber, Katie Tomsett, Imy Harper and Lucy Davies

A bumper edition

After the end of a near 17-year legal battle between popstar Katy Perry and fashion designer Katie Perry, the Unexpected Elements team has been inspired to explore the question at the heart of the case – what's in a name? 

First, we hear how marmosets use their calls as a way of naming which friend they’re talking to. Then, we discover why a phenomenon known as auditory pareidolia means you can’t necessarily believe your ears.

We're then joined by David Kaiser, professor of physics and history of science at the Massachusetts Institute of Technology, who explains just how hard it is to put physics into words. 

Also, the disappearance of indigenous languages, the law for naming laws, and where did all our hair go?

All that, plus many more Unexpected Elements.

Presenter: Marnie Chesterton with Andrada Fiscutean and Michael Kaloki 
Producers: Imy Harper, with Lucy Davies and Sophie Ormiston

In the name of science

With this year’s Oscars on the horizon, and vampire film Sinners nominated for a record-breaking 16 awards, the Unexpected Elements team sinks their teeth into some blood-sucking science.

First, we discover that Vlad the Impaler, the Romanian prince who inspired Dracula, may have not only had blood on his hands, but also in his tears. We also hear about a woman in Guadeloupe with the world’s newest and rarest blood type.

We’re then joined by Dr Naomi Ewald from the UK’s Freshwater Habitats Trust who tells us all about nature’s little bloodsuckers – leeches – and why their use in medicine is not just a practice consigned to the history books.

Also, the gravity-defying gecko of the Gambia, how close are we to producing artificial blood, and the Patagonian dinosaur that looks like a judgemental chicken.

All that, plus many more Unexpected Elements.

Presenter: Marnie Chesterton
Producers: Ella Hubber, with Sophie Ormiston, Lucy Davies and Imy Harper

Out for blood

The Hindu festival of Holi has the Unexpected Elements team delving into the science of colour. First up, forget chicken and egg, we bring you a whole new controversy of which came first: colour or colour vision? Then, we learn how a new development in infrared contact lenses could extend our range of vision and help people with colour blindness. 

We’re then joined by marine biologist Roger Hanlon who explains how octopuses are great at changing tones, even though they can’t appreciate the colours that they make. Plus, what’s orange, cream, 5,000 years old and worryingly resistant to most of our common antibiotics? And why does reading on dark mode leave one listener seeing things? All on this week’s Unexpected Elements. 

Presenter: Marnie Chesterton, with Andrada Fiscutean and Chhavi Sachdev
Producers: Imy Harper, with Ella Hubber and Lucy Davies

The colour of science

A dip in global cocoa prices got the Unexpected Elements team wondering about chocolate science. 

First, we look at how the microbial communities in cocoa beans fine tune the taste of chocolate. Also, could table sugar help us detect the missing bits of the universe? We look at how three elements in sugar were used in the hunt for dark matter. 

We’re then joined by Professor of Experimental Psychology Charles Spence, who explains the myriad ways that taste can be influenced – including the shape and name of chocolate, and even the music we listen to as we eat it. Plus, we hear about the rediscovery of a moth in South Africa that was lost to science for 150 years.

And finally, why we cry when we chop onions and the insects that pollinate the cocoa tree. That’s all on this week’s Unexpected Elements. 

Presenter: Marnie Chesterton, with Candice Bailey and Sandy Ong
Producers: Sophie Ormiston, with Lucy Davies, Tim Dodd, Imy Harper and Margaret Sessa-Hawkins

A sweet treat

Identical twins on trial for murder in France have left forensic experts unable to answer the question of which one pulled the gun’s trigger. With both having the same DNA, it got the Unexpected Elements team thinking, when do identical twins cease to be identical?

First, we look at how scientists have been confronting the possibility that they might soon be able to create an evil twin to life itself - mirror life. Also, we hear why the ‘Tatooine planets’ which orbit twin stars are so rare in our galaxy.

We’re then joined by professor of developmental psychology Nancy Segal, who explains why prosecutors should be able to distinguish between the French twins on trial. Plus, we hear how African farmers are struggling with a lack of data on pre-harvest crop loss.

And finally, why gorse flowers smell like pina coladas, and how the use of DNA evidence in court can still come down to interpretation. That’s all on this week’s Unexpected Elements.

Presenter: Marnie Chesterton, with Kai Kupferschmidt and Michael Kaloki
Producers: Ella Hubber, with Lucy Davies, Sophie Ormiston, Imy Harper and Tim Dodd

Seeing double

K-pop fans in Taiwan have been turning to the God of love in the hope it will boost their luck in getting concert tickets. It got the Unexpected Elements team thinking, are some people just lucky? 

First, we look at how music resonates in the brain and why listening to it live can feel more emotional. Also, can we measure how lucky we are? We look at a possible formula, and how you can increase your chances of striking on a lucky event. 

We are then joined by professor of marketing Marco Bertini, who explains the wild west of dynamic pricing and gives us some tips and tricks along the way. Plus we hear about Kenya’s ambitious plans to integrate traditional medicine into its health system.

And finally, why we dance when we pee and the Great British art of queuing. That’s all on this week’s Unexpected Elements. 

Presenter: Marnie Chesterton, with Phillys Mwatee and Imaan Moin
Producer: Margaret Sessa-Hawkins, with Ella Hubber, Lucy Davies, Imy Harper and Tim Dodd

Are you lucky?

The Winter Olympics has the Unexpected Elements team looking into some of the incredible science behind the sports. First up, the tale of India’s lone luge pilot: how did using old train tracks as sled runners give him a competitive edge? Then, we look at the physics behind a cheating scandal that has rocked the ski jumping world. Scientific studies tell us exactly how much difference changing a single stitch in a costume can make. 

Did you know there are different types of ice? Professor Christoph Salzmann has discovered three of them, and tells us what makes them unique. Plus dinosaurs, disease, and whether we laugh with an accent. All on this week’s Unexpected Elements. 

Presenter: Marnie Chesterton, with Chhavi Sachdev and Tristan Ahtone 
Producers: Margaret Sessa-Hawkins, with Lucy Davies, Imy Harper and Tim Dodd

Let the games begin

Are You Dead?

That’s the name of an app that’s gone massively viral in China. Every two days, you click a green button to confirm you’re alive and well – but if you miss it, an emergency contact is alerted.

The app is aimed towards those who live alone, so it’s got us contemplating the science of connection and loneliness. First, we take a look at the most isolated trees on Earth and how they act as important recorders of history. We also discuss NASA’s space probe Voyager 1, and how we can connect with a device that’s 25 billion kilometres away from us.

We’re joined by glaciologist Liz Morris, who shares what it was like to do research far from civilisation, in Antarctica. 

Then we reunite with a species that we thought was lost for ever, and answer an important question: just how big can spiders get?

All that, plus many more Unexpected Elements.

Presenter: Marnie Chesterton, with Candice Bailey and Ogechi Ekeanyanwu 
Producers: Ella Hubber, with Lucy Davies, Imy Harper, Tim Dodd, Sophie Ormiston and Margaret Sessa-Hawkins

Are you still with us?

Europe has a new entry/exit system based on biometric data. But what exactly is the science behind biometric data, how can we ensure it’s used responsibly, and can it be cracked?

We also look at how some animals use dung as biometric data with Dr. Adrian Shrader, how your walk can be used to ID you from Professor Mark Nixon, and why gold has its own special measurement. All that plus many more Unexpected Elements.

Presenter: Marnie Chesterton
Producers: Margaret Sessa-Hawkins with Lucy Davies and Robbie Wojciechowski

How does biometric data work?

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