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Revisited: The surprising science of dreams and nightmares
In this episode from January 2026, Ian Sample puts listeners’ questions about dreams and nightmares to Dr Michelle Carr, the director of the Dream Engineering Laboratory in Montreal’s Centre for Advanced Research in Sleep Medicine, and the
Revisited: A Scottish tea mystery, episode three – a bag for life
Science correspondent Nicola Davis investigates the strange story of Tam O’Braan and his attempts to grow tea in Scotland. In episode three of this mini-series first broadcast in October 2025, all of O’Braan’s lies come to a head and it is
Revisited: A Scottish tea mystery, episode two – the list
Science correspondent Nicola Davis investigates the strange story of Tam O’Braan and his attempts to grow tea in Scotland. In episode two of this mini-series first broadcast in October 2025, Nicola hears how O’Braan’s network of Scottish te
Revisited: A Scottish tea mystery, episode one – green shoots
Science correspondent Nicola Davis investigates the strange story of Tam O’Braan and his attempts to grow tea in Scotland. In episode one of this mini-series first broadcast in October 2025, Nicola looks back on her first meeting with O’Bra
Can a world-first gene therapy reverse ageing?
The first person has been treated with a highly anticipated new gene therapy that aims to turn back the clock on ageing cells. The trial is aimed at retinal cells, with the hope that encouraging them to behave as if they were young again co
Fungi: the invisible force protecting our planet
Scientists often talk about the importance of flora and fauna to the health of our planet, but Dr Toby Kiers, an evolutionary biologist and founder of the Society for the Protection of Underground Networks, wants us to consider another forc
Is male testosterone in freefall?
Men’s average testosterone levels have halved over the past 50 years, according to scientists who say society is facing a male fertility crisis. Rising levels of obesity and diabetes are expected to play a part, but the team behind the work
‘A break from scrolling’: how Gen Z fell in love with birding
In the last 50 years, Britain has lost an astonishing 73 million wild birds from its landscape, according to the British Trust for Ornithology. Habitat loss, pesticides, disease, cats and the climate crisis mean there are fewer birds than e
‘Beautiful blobs’: can scientists build life from scratch?
Researchers claim they are closer to creating life from nothing after building tiny, quivering blobs that use lab-made DNA to feed, grow and multiply in a dish. To find out how significant this step is, and where scientists hope it will lea
Reflecting pool algae: the science Trump needs to know
The Lincoln Memorial reflecting pool in Washington DC has hardly been out of the news since April when President Trump vowed to have it renovated, and painted ‘American flag blue’ by 4 July. Despite the pool being stripped, cleaned, coated
Nature or nurture: can genes make us behave ‘badly’?
How much do our genes determine about our lives, and could they influence traits like risk-taking, antisocial behaviour or even violence? Ian Sample talks to Kathryn Paige Harden, a behavioural geneticist and professor of psychology at the
Extreme heat: is the UK becoming a 40C country?
Met Office forecasters have issued a rare red weather warning for England, with temperatures potentially reaching 40C (104F) in some places. Europe is also dealing with a debilitating heatwave, with schools closed, trains cancelled and Fran
The audacious plan to refreeze the Arctic
Sea ice is melting fast and worsening the climate crisis. But what if there were a way to thicken it again? Madeleine Finlay is joined by environment editor Damian Carrington to discuss a bold attempt to refreeze the Arctic which is showing
Should we ban social media for under-16s?
The UK prime minister, Keir Starmer, has announced a social media ban for under-16s, as part of an online safety drive that aims to go even further than the world’s first ban, introduced by Australia last year. Many parents have welcomed th
‘The undruggable became druggable’: a gamechanging treatment for the world’s deadliest cancer
A daily pill can double survival time in patients with the world’s deadliest cancer, according to the results of a clinical trial that experts are saying is a gamechanger and one of the biggest breakthroughs in decades. To find out more abo
The dinosaurs who survived the asteroid
While many dinosaurs were wiped out when a colossal asteroid struck Earth 66m years ago, one group survived: birds. Prof Steve Brusatte, a palaeontologist at the University of Edinburgh, has written a new book, The Story of Birds, tracing t
Heatstroke, sports washing and VAR psychology: the science of the World Cup
It’s just a week until the first whistle of the 2026 World Cup. To mark the occasion, Madeleine Finlay talks to Ian Sample about the science behind the tournament. It’s likely to be one of the hottest ever World Cups, and scientists have wr
The incredible science of the sleeping brain
Humans have been wondering why we sleep for thousands of years. Is sleep’s purpose rest and relaxation, memory consolidation or maybe cognitive processing? In the last 15 years, scientists have discovered another possible explanation – wast
Are robots nearing their ChatGPT moment?
Last month at Beijing’s half marathon, a robot named Lightning beat the human world record by nearly seven minutes. It’s the latest in a string of AI-powered milestones that have got people wondering whether robots are about to enter our ev
Red-light masks: can they really slow ageing?
Home red-light therapy devices have exploded in popularity as masks, body wraps and mittens promise to reduce wrinkles, redness and even acne. But do the claims stack up, and what other benefits are scientists investigating? Ian Sample hear
Stateside with Kai and Carter: why the fight over abortion pills is only just beginning
The US supreme court has preserved nationwide access to mail-order abortion pills – for now. As Carter Sherman explains, the fight to protect this medication is far from over, as a nationwide, near-total abortion ban could be on the horizon
Can a name change transform PCOS outcomes for women?
After more than a decade of global consultation, polycystic ovary syndrome – which affects as many as one in eight women – has been renamed. The condition is caused by high levels of androgens, which can lead to symptoms such as excess hair
Ebola: how does it spread and can the outbreak be contained?
An outbreak of Ebola has emerged in the Democratic Republic of Congo and Uganda, leading to nearly 400 confirmed cases and more than 100 deaths. To find out how the outbreak might have begun, what authorities can do to contain it and why th
Stateside with Kai and Carter: Stacey Abrams on why gutting of the US Voting Rights Act is ‘evil’
The US supreme court dealt a devastating blow to the 1965 Voting Rights Act when it ruled in Louisiana v Callais in April that states cannot consider race in redistricting. Southern states from Tennessee to Alabama have rushed to erase majo
Hantavirus update, Pentagon’s UFO files, can art slow biological ageing?
Madeleine Finlay sits down with co-host and science editor Ian Sample to discuss three eyecatching stories from the week, including an update on hantavirus. Also on the agenda is the Pentagon’s release of a tranche of never before seen docu
Strange trip: why Trump is backing psychedelics
Last month President Trump signed an executive order designed to fast track both research and access to psychedelic drugs as treatments for mental health illnesses. The most prominent in the order was ibogaine, a drug derived from the root
100 years on Earth: celebrating David Attenborough’s birthday
To celebrate Sir David Attenborough’s centenary, Madeleine Finlay catches up with natural history writer Patrick Barkham, who has met the celebrated presenter. They explore how the natural world has changed in the century that Attenborough
Hantavirus explained: how does it spread and who is most at risk?
Three people have died after an outbreak of hantavirus onboard a cruise ship travelling from Argentina to Cape Verde. The World Health Organization says a total of seven cases – two confirmed by laboratory testing and five suspected – have
‘Historic breakthrough’: could the fossil fuel era be coming to an end?
The transition towards renewable energy received a boost last week when representatives from 57 countries met in Santa Marta, Colombia, for a world-first climate meeting aimed at bringing the fossil fuels era to an end. Madeleine Finlay hea
Sub-two-hour marathon, spooky houses explained and why is UK health in decline?
Madeleine Finlay sits down with co-host and Guardian science editor Ian Sample to talk through three eye-catching stories from the week, including the news that the number of years people in the UK are spending in good health has declined c
