Curious Cases

BBC

4.8 (754)
Science

Hannah Fry and Dara Ó Briain tackle listeners' conundrums with the power of science!

Oct 10 • Subscriber Early Access

Identical(ish)

Ever wondered how close nature can get to making a human clone? And what happens if identical twin brothers marry identical twin sisters and have babies - how similar are they? Our listener Chris has been pondering this very issue, and his question takes Hannah and Dara down another scientific rabbit hole. Our intrepid duo consider how one fertilised egg can somehow become two babies, why those babies aren’t quite genetic photocopies, and why even identical twins gradually become more different as they grow up. They also find out how studying twins is helping scientists learn lessons about how all of us age - and explore the classic, movie-perpetuated mystery of “twin telepathy”… could there maybe, possibly, be something to it?! There’s also just time to address the tricky issue of cloning. From Dolly the sheep to regenerative medicine, cloning science has paved the way for some serious breakthroughs; but could we ever clone a human? And more to the point, should we? Expect sheep, sci-fi, identical cousins, and a dash of disproven twin mythology, as Curious Cases makes its return! If you have an everyday mystery for the team to investigate, contact them on curiouscases@bbc.co.uk. Contributors: Xand van Tulleken - Doctor, broadcaster and Honorary Associate Professor of Infection and Population Health at University College London Kevin Sinclair - Professor of Developmental Biology and Head of Animal Sciences at the University of Nottingham Claire Steves - Principal Investigator at TwinsUK and Professor of Ageing and Health at King’s College London Chris van Tulleken - Doctor, broadcaster and Professor of Infection and Global Health at University College London Producer: Lucy Taylor Executive Producer: Sasha Feachem A BBC Studios Production
4d ago

Trailer

Hannah Fry and Dara Ó Briain return for a new series, and a whole lot of new problems to solve!
Jan 2

Frosty Fractals

One winter morning, listener Jane opened her curtains to find her car roof covered in breathtaking, fern-like frost so intricate it looked like a William Morris print. But how does something as ordinary as ice create patterns so beautifully complex? Hannah and Dara explore this crunchy, slippery, delicately patterned branch of chemistry to uncover the rules and mysteries that govern the extra-ordinary world of ice. Why does ice come in so many shapes and sizes? And does all ice form at 0 degrees Celsius? Is every snowflake truly unique? We have questions a plenty for our eager chemists, who, as all good chemists do, have a few demonstrations up their sleeves to help explain. And we explore nature’s hidden geometry to find why these frost ferns follow the same rules as lightning bolts, river deltas and even human lungs. You can send your everyday mysteries for the team to investigate to: curiouscases@bbc.co.uk Contributors Sarah Hart – Professor Emerita of Mathematics, Birkbeck University of London Christoph Salzmann – Professor of Physical and Materials Chemistry, UCL Dr Thomas Whale – Lecturer, Institute for Climate and Atmospheric Science, University of Leeds Producer: Emily Bird Executive Producer: Sasha Feachem A BBC Studios Production
12/31/2025

Mining for Gold (GOLD!)

From pharaohs' tombs in Ancient Egypt and medieval currency, to priceless royal jewellery and Spandau Ballet songs - gold has been prized for millennia. But it's only really in the last century or so that we've started uncovering its usefulness in less decorative applications. Today, gold is used in masses of electricals; it's also revolutionised part of the manufacturing sector by stopping a dangerous reliance on mercury as a catalyst; and it's vital to space missions. Although there are also some more frivolous modern uses for gold, as Hannah and Dara discover. (Gold-leaf in your cocktail, anyone?) Challenged to find out whether all the world's mined gold would really fit in an Olympic swimming pool, our science-savvy duo discover that this antisocial element might just be the best darn thing on the periodic table... Contributors: - Graham Hutchings, Regius Professor of Chemistry at the University of Cardiff - Frances Wall, Professor of Applied Mineralogy in the Camborne School of Mines at the University of Exeter - Tim Peake, Astronaut Producer: Lucy Taylor Executive Producer: Sasha Feachem A BBC Studios Production
12/19/2025

Phantom Pain

What exactly is 'phantom pain' and how does it work? Hannah and Dara investigate a medical phenomenon that's been known about for centuries but is often misunderstood; and involves masses of unanswered questions. The condition 'phantom pain' is when someone gets a sensation of pain that feels like it's coming from a part of their body that's no longer there - so that could be an amputated limb, or perhaps something that has been removed, such as a tooth or an organ. It's thought to be caused by how the brain and body process pain and physical awareness, but there's still debate around what exactly is going on neurologically. Researchers around the world are looking into the condition; in the meantime, people who experience phantom pain - like today's studio guest Lynn - often have to try out a range of treatments, to find out what combination works best for them. But as the team discover, pain is deeply subjective - and in this case, there is really no 'right answer'... Contributors: - Tamar Makin, Professor of Cognitive Neuroscience at the MRC Cognition and Brain Sciences Unit at the University of Cambridge, where she leads the Plasticity Lab; - Lynn Williams, a qualified therapist and upper limb amputee who volunteered as a subject for one of Tamar’s research programmes; - Carlos Roldan, Associate Professor in the Department of Pain Medicine at the University of Texas MD Anderson Cancer Center; - Keren Fisher, a Consultant Clinical Psychologist who’s worked in the NHS for more than four decades; largely in pain management at the Royal National Orthopaedic Hospital. Producers: Emily Bird & Lucy Taylor Executive Producer: Alexandra Feachem A BBC Studios Audio Production
12/12/2025

Tortoise Tomfoolery

Tortoises have traditionally been the poster child for slowness. These ancient, armoured reptiles are solitary, territorial and all-too-often dismissed as dull. In fact, tortoises have distinct personalities. They have changeable moods, can learn simple tasks, remember certain useful information for years and even recognise familiar people. But can they play? Hot on the trail of tortoise tomfoolery, Hannah and Dara explore the stereotype-smashing studies that show there's far more to these creatures than previously thought; and find out that these complex behaviours might apply not only to the turtle clan, but potentially other reptiles as well... To submit your question to the Curious Cases team, please email: curiouscases@bbc.co.uk Contributors: - Anna Wilkinson, Professor of Animal Cognition at the University of Lincoln - Unnar Karl Aevarsson, Herpetologist at ZSL London Zoo - Gordon Burghardt, Distinguished Service Professor in the Departments of Psychology, Ecology and Evolutionary Biology at the University of Tennessee Producer: Lucy Taylor Executive Producer: Alexandra Feachem A BBC Studios Production
12/05/2025

Planetary Wobble

Could you survive an eternal winter? Or is endless summer sun a more appealing prospect? Lots of us are grateful for the seasonal changes that shape the world around us, but this week Hannah and Dara are asking what life would look like without the axial tilt that brings each hemisphere closer and further away from the sun as the seasons change each year. Listener Andrew from Melbourne wants to know what would happen if the planet stood perfectly upright, no lean, no tilt, no seasons. But what else could happen? Is Earth’s 23-degree slant the cosmic fluke that made life possible? To find out, Hannah and explore how losing the tilt reshapes climate, ecosystems, evolution and maybe even the fate of the dinosaurs. You can send your everyday mysteries for the team to investigate to: curiouscases@bbc.co.uk Contributors Dr Robin Smith - Climate modelling researcher at the University of Reading Professor Rebecca Kilner - Evolutionary Biologist and Head of the Department of Zoology at Cambridge Professor Amaury Triaud - Professor of Exoplanetology at the University of Birmingham Aidan McGivern - Meteorologist and Senior weather presenter at the MET Office Producer: Emily Bird Executive Producer: Sasha Feachem A BBC Studios Production
11/28/2025

Immortal Jellies

Could immortality ever be possible for humans? It sounds like something from a sci-fi movie, but floating in oceans around the world is a tiny, transparent jellyfish that could hold the answer... Turritopsis dohrnii, known as 'the immortal jellyfish', isn’t immortal in the true sense of word - it can die - but it has a nifty way of avoiding that fate. In times of stress, this miniscule jelly can biologically reverse its aging process, reverting from 'medusa' (adult jellyfish) to a juvenile form and starting its life-cycle again; potentially ad infinitum. Abilities like these could hold the key to - if not exactly 'immortality', then at least regenerative or long-life treatments for humans in future. But of course there's a catch: these extremely delicate jellyfish can still easily die from predation, disease, or environmental threats and are extremely difficult to keep healthy in a lab environment. Hannah and Dara hear about new technology that could change the way we study immortal jellyfish, and discover various other super-abilities in the animal kingdom that could help in our quest for healthier, longer lives. Contributors: - Miranda Lowe, Principal Curator of Crustacea and Cnidaria at London’s Natural History Museum - Alex Cagan, Assistant Professor in the Department of Genetics, Department of Pathology and Department of Vet Medicine at the University of Cambridge - Maria Pia Miglietta, Associate Professor of Marine Biology at Texas A&M University in Galveston - Nicole Xu, Assistant Professor of Mechanical Engineering, Robotics and Biomedical Engineering at the University of Colorado, Boulder Producer: Lucy Taylor Executive Producer: Sasha Feachem A BBC Studios Production

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Hannah Fry

Host
Dara Ó Briain

Host
Adam Rutherford

Host
Sarah Hart

Guest
Christoph Salzmann

Guest
Thomas Whale

Guest
Graham Hutchings

Guest
Frances Wall

Guest
Tim Peake

Guest
Lynn Williams

Guest

4.8

out of 5

754 Ratings

Beginning to end

Jul 22

Coco_De

Just found curious cases, listening from the start. Bring it.
No longer listening to the transphobic BBC

Jan 9

markpa

I am unfollowing all BBC podcasts in protest of their decision to force Robin Ince from the Infinite Monkey Cage podcast for his support of transgender individuals.
Ok

08/16/2025

A. Maguire

The male guest on Clowns in Spacetime dragged my entire review down a Star that’s how infuriatingly pedantic he was
Stop playing ICE ads

07/04/2025

Puzzled petunia

Love the show - especially Dara, since Mock The Week is no more. The topics are smart and I always learn something without being bored or perplexed. But BBC needs to check their ad network. The last episode (Crows) had 2 obnoxious ICE recruitment ads. I thought the BBC had a history of fighting N***s. Will rate as 5 stars once the ICE ads are gone. If I hear another set of ICE ads I might need to boycott all BBC podcasts.