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The Guardian

Twice a week, the Guardian brings you the latest science and environment news

Science Weekly

The Guardian’s science editor, Ian Sample, talks to Madeleine Finlay about three eye-catching science stories from the week, including a study that suggests positive thinking can boost immune response. Also on the agenda is the mysterious rise of scabies in the UK, and the discovery that cows are more adept with tools than previously known. Help support our independent journalism at theguardian.com/sciencepod

How positivity affects health, the rise of scabies and bovine intelligence

Studies detecting microplastics throughout human bodies have made for alarming reading in recent years. But last week, the Guardian’s environment editor, Damian Carrington, reported on major doubts among a group of scientists about how some of this research has been conducted. Damian tells Ian Sample how he first heard about the concerns, why the scientists think the discoveries are probably the result of contamination and false positives, and where it leaves the field. He also reflects on how we should now think about our exposure to microplastics. Help support our independent journalism at theguardian.com/sciencepod

Is your body really full of microplastics?

Ian Sample puts listeners’ questions on dreams and nightmares to Dr Michelle Carr, director of the Dream Engineering Laboratory in Montreal’s Centre for Advanced Research in Sleep Medicine, and author of the new book Into the Dream Lab. They look at why we dream, what we can learn by examining our dreams, and what we can do when dreams turn to nightmares. Dr Carr gives her top tips for taking charge of our dreams and trying to influence their content. Help support our independent journalism at theguardian.com/sciencepod

The surprising science of dreams and nightmares

Ian Sample puts listeners’ questions on sleep to Dr Allie Hare, consultant physician in respiratory and sleep medicine at Guy’s and St Thomas’ hospitals and president of the British Sleep Society. They cover why women experience sleep disturbance during the menopause, why sleep paralysis affects some people more than others, and what scientists know about the link between sleep and dementia. Hare also gives her top tips for getting better sleep in 2026. Help support our independent journalism at theguardian.com/sciencepod

How to sleep well in 2026

Last year was full of unexpected science news, from the discovery of a new colour, to the interstellar visitor 3I/Atlas passing by our solar system, and a world-first treatment with a personalised gene editing therapy. So what will this year bring? Ian Sample and science correspondent Hannah Devlin discuss the big stories likely to hit the headlines and share their predictions for 2026. Help support our independent journalism at theguardian.com/sciencepod

Our science predictions for 2026

The US capture of Nicolás Maduro and his wife, Cilia Flores, on Saturday left many people wondering why? Donald Trump hinted at an answer when he claimed the Venezuelan regime had stolen US oil rights and that American oil companies would help to run Venezuela going forward. Jillian Ambrose, the Guardian energy correspondent, explains to Ian Sample the appeal of Venezuelan oil to the US, how easy it is to extract and what the latest action tells us about Trump’s energy strategy. Help support our independent journalism at theguardian.com/sciencepod

Crude appeal: why Trump wants Venezuela’s oil

Kevin Hall spent 21 years at the US National Institutes of Health and became known globally for his pioneering work on ultra-processed foods. In April he unexpectedly took early retirement, citing censorship under the Trump administration. Now he has co-authored a book with the journalist Julia Belluz that aims to bust myths and challenge wellness orthodoxy on everything from weight loss and metabolism to supplements and wearables. In this episode from October, Hall tells Ian Sample what he wants us all to understand about diet, exercise and weight loss, and what led to his departure from the job he loved. Help support our independent journalism at theguardian.com/sciencepod

Revisited: the real science of weight loss

More of us are turning to products containing mushroom extracts, with the medicinal fungi market worth billions of pounds. Promises of mental and physical health benefits have seen its popularity spill over from wellness influencers to the shelves of Marks & Spencer – but is there any scientific evidence behind these claims? In this episode from June, Ian Sample chats to Madeleine Finlay about the appeal of mushroom drinks and supplements, and hears from the mycologist Prof Nik Money on what we really know about how fungi can affect our minds and bodies. Help support our independent journalism at theguardian.com/sciencepod

Revisited: do medicinal mushroom products actually work?

Psychologists have typically believed that we become less curious as we age, but recent research has shown curiosity actually becomes more targeted and specific in our later years. In this episode from September, Madeleine Finlay hears from Dr Mary Whatley, an assistant professor of psychology at Western Carolina University, and Dr Matthias Gruber of Cardiff University’s Brain Research Imaging Centre to find out why we change in this way, and how maintaining broad curiosity into older age can help keep our brains young. Help support our independent journalism at theguardian.com/sciencepod

Revisited: is curiosity the key to ageing well?

Scientists are beginning to understand that ageing is not simply a linear process and we age, according to recent research, in three accelerated bursts: at about 40, 60 and 80 years old. In this episode from July, Ian Sample talks to Stanford University’s Prof Michael Snyder, who explains what the drivers of these bursts of ageing could be, and how they might be counteracted. Help support our independent journalism at theguardian.com/sciencepod

Is your body really full of microplastics?

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