The astrophysicist Professor Lisa Kaltenegger is like an explorer of old, but her voyage takes her far from earth, planet hunting across the universe. She is Director of the Carl Sagan Institute to Search for Life in the Cosmos at Cornell University, and in her new book Alien Earths she describes the very latest discoveries of exoplanets which are the best contenders for harbouring alien life.

Claudia de Rham is Professor of Theoretical Physics at Imperial College London and in her book The Beauty of Falling she tells the story of gravity. From her personal experience of diving in the ocean and freefalling over the earth, to exploring the limits of Einstein’s general theory of relativity she seeks to understand both the feeling and the fundamental nature of gravity.

If only all of physics could be so compelling! Professor Mark Fromhold is Head of Physics at Nottingham University and is campaigning for a change to the way pupils are taught, suggesting that quantum physics be incorporated into the curriculum. He argues that at present the subject is too earth-bound, and ‘dull as dishwater’.

Producer: Katy Hickman

London, and the river that runs through it, is at the heart of the new play London Tide, an adaptation of Charles Dickens’ Our Mutual Friend. Ben Power has adapted the novel and co-written original songs with the singer-songwriter PJ Harvey. He tells Adam Rutherford that although it combines the savage satire and social analysis of the original, it is, in essence, a love letter to the capital. London Tide is playing at the National Theatre until 22nd June.

The award-winning architect Amanda Levete reflects on the challenges of designing buildings and public spaces in major historic cities around the world – taking into consideration the aesthetics of the built environment, whilst meeting the needs of the community and tackling sustainability.

Amanda Levete considers the Pompidou Centre in Paris to be one of the twentieth century’s most iconic buildings and an inspiration for her own architectural practice. The journalist Simon Kuper takes stock of his adopted city, as Paris prepares for the Olympics. In Impossible City he explores today’s ‘Grand Paris’ project which aims to connect its much famed central areas with its neglected suburbs.

Producer: Katy Hickman

2024 has been dubbed the year of elections, as at least 64 countries – including the UK – are heading for the polls. Tom Sutcliffe and guests explore the state of democracy.

The political philosopher Erica Benner reflects on the tensions in liberal democracy in her book, Adventures in Democracy: The Turbulent World of People Power. From her childhood in post-war Japan, to working in post-communist Poland, and with forays into ancient Greece and Renaissance Erica Benner looks at the role of ordinary citizens in keeping democracy alive.

Democracy in India has a long history with roots in ancient councils of elders, although its modern manifestation began with independence from British rule in 1947. But the anthropologist Alpa Shah raises questions about how far democratic institutions are failing in India, as minority groups - the Dalits, Adivasis and Muslims - are targeted and demonised, in her new book The Incarcerations.

The UK will have a general election this year, and although satisfaction with politics ranks very low in relation to other countries, faith in democracy continues to rise. The research is by the Policy Institute at King’s College London, and its director Bobby Duffy says that while there’s little support for authoritarian forms of government, the idea of Citizen Assemblies are becoming more popular.

Producer: Katy Hickman

Humankind’s relationship with music can be traced back millions of years and across continents. In Sound Tracks the archaeologist Graeme Lawson unearths some of the oldest instruments, from water-filled pots in Peru from AD700 that chirp like a bird, to bells from a tomb in 5th century China. He argues that music is part of what makes us human.

An ancient horn, played from a watchtower on Hadrian's Wall, is a far cry from the modern version the award-winning trumpeter Alison Balsom plays. She is giving the UK premiere of Wynton Marsalis’ Trumpet Concerto with the London Symphony Orchestra (Barbican on the 11th April; Bristol Beacon on the 12th). This is a contemporary piece that showcases the huge versatility of the trumpet, from the opening pre-historic-sounding wild elephant call to ceremonial fanfare and New Orleans jazz.

The celebrated poet John Burnside’s new collection, Ruin, Blossom explores what it is to be human as we contemplate our mortality. But even amidst the ruin and death and decay, his words reveal the beauty and hope in the everyday natural world: ‘first sun streaming through the trees … a skylark in the near field, flush with song’.

(Extract from Wynton Marsalis’ Trumpet Concerto, played by Alison Balsom with the Swedish Radio Orchestra in a concert from 17th February 2024, with permission from the Swedish Radio Orchestra )

Producer: Katy Hickman

The historian Michael Taylor looks back at the past tug of war between religion and science, and how the discovery of ancient bones challenged religious orthodoxy. Impossible Monsters: Dinosaurs, Darwin and the War Between Science and Religion is the story of a group of people whose insights tested beliefs about creation and cosmology, and ushered in the secular age.

But Nick Spencer from the thinktank Theos dismisses the idea that science has rightly relegated religion to the margins. In his new book Playing God: Science, Religion and the Future of Humanity (co-authored with Hannah Waite) he argues that religious belief is uniquely placed to help people navigate a world dominated by scientific breakthroughs – from AI to aliens, gene editing to the treatment of mental health.

Professor Frances Flinter has been at the forefront of innovations in the treatment of genetic conditions for decades in her role at Guy’s & St Thomas' NHS Foundation Trust. She is also a member of the Nuffield Council on Bioethics and says that medical decisions are rarely based purely on science, but involve thinking about what it means to be human.

Producer: Katy Hickman

The Vietnamese American writer Viet Thanh Nguyen was awarded the Pulitzer prize for his debut novel The Sympathiser in 2016. Now he turns his attention to memoir, in A Man of Two Faces. He was four when he was forced to flee Vietnam with his family, but as he looks back at his life he explores the necessity of forgetting and remembering, and how far the promise and dream of America can be trusted.

The journalist and Deputy Editor of Harper’s Bazaar Helena Lee wants to showcase the voices and experiences of writers from the East and Southeast Asian diaspora living in the UK. East Side Voices celebrates the diversity of that experience and explores the impact on identity, community and family.

Jessica J. Lee was born in Canada to a Taiwanese mother and a Welsh father and in her collection of essays, Dispersals, she muses on the question of how plants and people become uprooted and cross borders. Combining memoir, history, and scientific research she explores how entwined our fortunes, movement and language are with the plant world.

Producer: Katy Hickman

Andrey Kurkov is Ukraine’s most celebrated novelist. When Russia invaded Ukraine he turned his writing to journalism and memoir, but his latest book is a work of fiction set amid the chaos of the Russian Revolution. The Silver Bone (translated by Boris Dralyuk) is the first in a trilogy of historical mysteries in which the recently orphaned detective investigates his first case while Bolsheviks, Cossacks, and white Army Guards all vie to take control of Kyiv.

The journalist and writer Peter Pomerantsev retells the daring story of the WWII propogandist Sefton Delmer who managed to infiltrate German airwaves and skilfully question Nazi doctrine. How to Win an Information War reveals the extent of the complexity of spin and indoctrination used in the past, alongside the role of propaganda today in Putin’s Russia.

The information war is heading into a new era with the development of generative AI which makes it simple to produce fake text, audio and videos. The news editor at MIT Technology Review Charlotte Jee says the pace of change is extraordinary, and regulation is lagging behind, as deepfakes are becoming more difficult to distinguish from actual human content.

Producer: Katy Hickman

The Nobel prize winning molecular biologist Venki Ramakrishnan explores how time affects our bodies, brains and emotions in his new book, Why We Die: The New Science of Ageing and the Quest for Immortality. As he explains the recent scientific breakthroughs to extend lifespan by altering our biology, he also considers the ethical questions such efforts raise.

The neuroscientist Charan Ranganath asks a different question in his book, Why We Remember. Using case studies he unveils the principles behind how the brain retains information, and what and why we forget so much. He also looks at what happens to our memories as we age.

In her new book, Nostalgia, the historian Agnes Arnold-Forster blends social history and psychology in a quest to understand this complex emotion. While it was thought of as an illness in the 17th century, it is now used as a widespread marketing tool impacting our choices from politics to food. But if nostalgia prompts us to glorify the past, Arnold-Foster asks how that impacts the present, and future.

Producer: Katy Hickman

The plant Rafflesia has the world’s largest flowers and gives off one of the worst scents; it’s also something of a biological enigma, a leafless parasite that lives off forest vines. For the botanist Chris Thorogood, an expert in parasitic and carnivorous plants at the Oxford Botanic Garden and Arboretum, Rafflesia is also an obsession. In his book, Pathless Forest, he goes in search of this mysterious plant in some of the last wildernesses in South East Asia.

Dr Kelsey Byers is an evolutionary chemical ecologist who specialises in floral scent and its influence on the evolution of flowering plants. In her laboratory at the John Innes Centre in Norwich she studies how flowers use different smells to attract their pollinator of choice. From sweet aromas to the stink of rotting flesh, she explores how plants use con-artistry and sexual deception to thrive.

The ethnobotanist William Milliken from Kew Gardens has spent much of his career working with indigenous people in the Amazon to preserve traditional plant knowledge. Now he’s focused on collecting folklore about the use of plants to treat ailments in animals in Britain. From wild garlic treating mastitis in cows, to cabbage for flatulence in dogs, he hopes to uncover a cornucopia of plant-based veterinary medicines.

Producer: Katy Hickman

Over the past 50 years, worldwide obesity rates have tripled, and now headlines increasingly shout of a public health crisis, even an obesity epidemic. Tom Sutcliffe explores the consequences of using such negative and emotional language to describe weight and the increasing rates of fat phobia in society. He looks at the health issues and the so-called ‘miracle drugs’ that suppress appetite, and where genetics and diet meet.

He’s joined by Naveed Sattar, Professor of Metabolic Medicine at the University of Glasgow and recently appointed as the UK Government’s Obesity Mission Chair, the body-positive activist Stephanie Yeboah who’s the author of Fattily Ever After, and the businessman Henry Dimbleby whose book Ravenous reveals the mechanisms behind our food systems.

Producer: Katy Hickman