Brian Cox and Robin Ince slice deep into the lesser-explored world beneath us. To join them on the journey from the crust to the core they are joined by seismologist Ana Ferreira, geologist Chris Jackson and comedian Phil Wang.

School children learn about the make-up of the Earth with an image depicting the Earth's core, mantle and crust layered neatly on top of each other, but is this an oversimplification? Our experts reveal that the Earth's innards are less uniform than we might think and mysteries still abound, including the make-up of some continental-sized blobs deep inside the Earth. We learn about the incredible heat and pressure as we descend and why that has limited how far humans have been able to explore these deep realms first-hand. We explore the chemistry of the interactions between the Earth layers and how they influence the formation of continental plates and volcanoes. Phil has an existential crisis about falling inside gaps between the plates but is reassured his worries are unfounded as Ana explains the latest techniques being used to understand the world deep beneath us.

Producer: Melanie Brown

Brian Cox and Robin Ince look ahead to the topics and guests you can enjoy in Series 32 of The Infinite Monkey Cage.

Listen first on BBC Sounds from Wednesday 19 February, 2025.

Brian Cox and Robin Ince uncover the unexpected history of the body in the archives of the Royal Society with special guests Prof Helen King, Sir Mark Walport, Keith Moore and Ed Byrne. Together they dissect some of the most surprising and peculiar beliefs that have been held about the body over the last 500 years, from wandering-womb hypotheses to tobacco-enema resuscitations. They unearth how scientific discoveries have often originated from brave individuals, willing to volunteer their own bodies in the pursuit of science. Our panellist Sir Mark Walport has continued in this tradition of self-experimentation, and has with him x-rays of his own faeces for show and tell!

Producer: Melanie Brown

BBC Studios Audio Production

Brian Cox and Robin Ince dig into de-extinction asking, could we and should we resurrect creatures of the past? They are joined by geneticist Adam Rutherford, palaeontologist Susannah Maidment and comedian/virologist Ria Lina.

Extinction has played a significant role in shaping the life we see on Earth today. It is estimated around 95% of species to have ever existed are already extinct - but could any of these extinctions be reversed? Our panel explore the different methods being pursued in these resurrection quests, including back-breeding, cloning and genetic engineering. They take a close look at the case of the woolly mammoth and the suggestion they could be returned to the Arctic tundra. Some claim the mammoth is the key to ecosystem restoration, but our panel have some punchy opinions on whether this Jurassic Park fantasy is even ethical.

Producer: Melanie Brown

BBC Studios Audio Production

Brian Cox and Robin Ince expand their knowledge of elasticity with Olympian Bryony Page, comedian Jessica Fostekew & experts Dr Anna Ploszajski and Prof James Busfield from Queen Mary University of London.

What makes stretchy things stretch? Together our panel journey through different applications of elastic materials and examine, at the molecular level, what happens when we stretch a material and crucially what causes it to return to its original shape. This is especially pertinent to our guest Olympic and British champion trampolinist Bryony Page who has capitalised on elasticity in her 24 year long career. We discover that the bounce of a trampoline mainly comes from the elasticity of steel and how dependent this is on temperature. Cold temperatures are not only treacherous for trampolines; we explore how the cold proved fatal to the elastic components of both the Titanic and the Challenger space shuttle.

Plus we hear how scientists sometimes just can’t beat nature; natural rubber and spiders silk are two such cases. Anna Ploszajski takes us through some of the more inventive techniques scientists have engineered to produced more of these natural materials, including genetically engineering goats to be milked for silk.

Producer: Melanie Brown

BBC Studios Audio production

Brian Cox and Robin Ince investigate the science of baby making - don’t worry, all theory, no practice! They are joined by Professor Joyce Harper, Dr Ben Steventon and comedian Sara Pascoe to discuss how just two cells can turn into trillions, or in other words, how an embryo can turn into an embryologist.

The embryo-building processes across species are remarkably similar, yet there is still so much we don’t know about the beginning of life. Our panel discuss these unknowns, the latest in fertility treatments and what new capabilities might be available to future parents. It seems that artificial wombs may not be science fiction for much longer and scientists are closing in on being able to make egg and sperm cells out of stem cells. So yes, Brian and Robin could one day have a baby!

Producer: Melanie Brown

BBC Studios Audio Production

Brian Cox and Robin Ince consider how different our understanding of the universe would be without the stars. They are joined by Maggie Aderin-Pocock, Roberto Trotta and comedian John Bishop who illuminate all that we have learnt from the stars and how different life would be without them.

Every culture has looked up at the night sky, but why are we so drawn to the pin pricks of light in the sky above us all and how have they helped shape human civilisation? Roberto Trotta takes us back to the origins of astronomy, to women who he believes were the first astronomers, linking the orbital period of the moon with the length of the menstrual cycle. We continue the historical journey, through the astronomical greats, Galileo, Copernicus and Kepler, who all in part owe their scientific discoveries to the stars. Our panel marvel at how we, an infinitesimally small part of the universe, are able to look up at the stars and comprehend what is beyond and how this stargazing has profoundly shaped our sense of selves as well as underpinned science as we know it.

Producer: Melanie Brown

BBC Studios Audio production

Brian Cox and Robin Ince emerge from the hedge row waking up their guests from hibernation to discuss the fascinating lives of Britain’s favourite mammal, the hedgehog. They are joined by hedgehog experts Hugh Warwick and Sophie Lund Rasmussen (also know as Dr Hedgehog), and by broadcaster and poet Pam Ayres. Sophie Lund Rasmussen has crowd sourced 14 freezers worth of dead hedgehogs for her research and has brought one of her more unique samples with her, the penis of the oldest known hedgehog who reached a stupendous 16 years of age! Together our panel snuffle their way through the evolution of hedgehogs, their life cycle and how to stop them getting run over by robotic lawn mowers!

Producer: Melanie Brown

BBC Studios Audio production

Brian Cox and Robin Ince head to Bletchley Park with comedian Alan Davies, and cyber experts Victoria Baines and Richard Benham to decode cyberwarfare and discuss its future.

As computers have shrunk from the size of rooms to fitting in our jacket pockets, our cyber sleuths explore the changing nature of cyber-attacks and defence. They decipher the fancy jargon abounding in cyber land, from trojan horses to phishing scams and reveal how prolific these attacks are on nation states, businesses and the public. From digital army battalions to teenage freelance hackers, the cyber-villains are multiple and varied. Our panel discusses the aims of these malevolent forces; from extorting money and holding valuable commercial data hostage to influencing people’s electoral intent.

The panel explores how AI and quantum computing are supercharging cyberwarfare – but in good news, also cyber-defence. Alan Davies shares his susceptibility to being tricked online whilst our experts give some tips for staying safe online, and finally, Alan comes up with his surprising alter-ego hacking name.

Producer: Melanie Brown

BBC Studios Audio production

Are we alone in the universe? Brian Cox and Robin Ince venture to Glastonbury in the search for alien life and are joined in their galactic quest by comedian Russell Kane and astronomers Lisa Kaltenegger and Chris Lintott. They imagine the sorts of worlds that might best host alien life, how some of the biological and technological signatures of alien life might appear as well as how evolution might shape this life. They discuss some of the mysterious signatures that have appeared as well as how hard it is to really know what you're looking for and how objects like faulty microwaves have muddied the alien-finding waters.

Producer: Melanie Brown