Science Weekly

Scientists have created synthetic human embryos using stem cells in a groundbreaking advance that sidesteps the need for eggs or sperm. Madeleine Finlay speaks to science correspondent Hannah Devlin about her world exclusive story on this development, what it could mean for medical research, and whether the ethical and regulatory classifications of these embryos are keeping pace with the science. Help support our independent journalism at theguardian.com/sciencepod

At the start of 2023, the UK postal service Royal Mail was hit with an ultimatum: pay $80m (£67m) or continue to have international shipments blocked. The demand came from Russian-linked hackers the LockBit group, who had infiltrated Royal Mail’s software. Royal Mail refused to pay and eventually reinstated its overseas deliveries, but the cyber-attack came at a huge cost to the company and others that depend on its service. Ransomware attacks like this one are on the rise. So too are phishing attempts, emails and texts that try to fool recipients into clicking on links that contain malware or ask for personal information. Ian Sample speaks to the Yale law professor and author Scott Shapiro about cybercrime, how attacks hack into our psychology and what individuals and governments could do to stop it. Help support our independent journalism at theguardian.com/sciencepod

Ian Sample speaks to the Guardian’s health editor, Andrew Gregory, and Dr Roy Herbst about the world’s biggest annual gathering of oncology professionals. Each year’s event features a mass of new research, and 2023 was no exception. What were the standout advances, and could they lead to permanent changes in the way we treat, think about and live with cancer?. Help support our independent journalism at theguardian.com/sciencepod

Madeleine Finlay speaks to Doug Weir from the Conflict and Environment Observatory about why the collapse of the Kakhovka dam is likely to be so damaging for biodiversity, access to clean water and levels of pollution. He explains why the environment has become such a central part of the narrative and considers what this increased focus could mean for Ukraine’s eventual recovery. Help support our independent journalism at theguardian.com/sciencepod

Last week, Nasa held the first public meeting of a panel established to investigate sightings of UFOs. It came just before a whistleblower former intelligence official told the Debrief that the US government had ‘intact and partially intact’ craft of non-human origin. Ian Sample talks to Prof David Spergel, the independent chair of Nasa’s panel, about why this is happening now, what they hope to find and why there is so much stigma attached to this field. Help support our independent journalism at theguardian.com/sciencepod

Ian Sample talks to Dr Rachel Clarke about her experience working in palliative care in the NHS and now with hospices in Ukraine. She tells him what dying can teach the living, what we can learn from the Covid pandemic, and reveals the anguish and defiance of trying to provide a dignified death in the midst of war. Help support our independent journalism at theguardian.com/sciencepod

Food allergies appear to be increasing globally, but as scientific understanding improves, some experts believe we may one day be able to eliminate them altogether. Ian Sample speaks to Dr Kari Nadeau, an allergy specialist at Harvard School of Public Health and author of the book The End of Food Allergy, to discuss why food allergies are on the rise and what we can do to prevent – and possibly even cure – them. Help support our independent journalism at theguardian.com/sciencepod

Every year, the world’s leaders gather for the UN climate change conference. At Cop28, they will be faced with two stark warnings from scientists: we are likely to breach 1.5C warming above pre-industrial levels in the next five years, and we are on course to reach 2.7C of warming by the end of the century. Progress has never been more critical and this year it lies in the hands of the United Arab Emirates, a country that has plans to expand its already extensive oil and gas productions. With six months to go, Madeleine Finlay talks to environment correspondent Fiona Harvey about Cop28’s hosts and president, why this year is particularly key, and how close we are getting to irreversible climate tipping points. Help support our independent journalism at theguardian.com/sciencepod

Since it was introduced to the UK in 1850, Japanese knotweed has gone from novel ornamental plant to rampant invasive species. Madeleine Finlay speaks to journalist Samanth Subramanian about the huge costs associated with finding it on a property, and Dr Sophie Hocking explains what the plant, and our attempts to control it, might be doing to the environment.. Help support our independent journalism at theguardian.com/sciencepod

We now know that global temperatures are likely to temporarily rise by more than 1.5C above pre-industrial levels in the next five years. Breaching this crucial threshold will give humanity an insight into what the next few decades could bring. It will undoubtedly have serious consequences in all aspects of our lives, including what we eat. In the second of our special series of episodes looking at what a future world might look like, science editor Ian Sample explores how our diets could change as the Earth heats up. Ian talks to Kew’s kitchen gardener Helena Dove about climate-resilient vegetables, visits Tiziana di Costanzo’s insect farm to try mealworms and crickets, and hears from Solar Food’s CEO, Pasi Vainikka, about making food from bacteria, electricity and air. Help support our independent journalism at theguardian.com/sciencepod