The Conversation Weekly

Without a sense of time, leading us from cradle to grave, our lives would make little sense. But on the most fundamental level, physicists aren't sure whether the sort of time we experience exists at all. We talk to three experts and find out if time could potentially be moving backwards as well as forwards. Featuring Sean Carroll, Homewood professor of natural philosophy at Johns Hopkins University, Emily Adlam, postdoctoral associate of the philosophy of physics at Western University and Natalia Ares, Royal Society university research fellow at the University of Oxford.This episode was presented by Miriam Frankel and produced by Hannah Fisher. Executive producers are Jo Adetunji and Gemma Ware. Social media and platform production by Alice Mason, sound design by Eloise Stevens and music by Neeta Sarl. A transcript is available here. Sign up here for a free daily newsletter from The Conversation.Further reading: Quantum mechanics: how the future might influence the pastFour misconceptions about quantum physics

When ChatGPT burst onto the technology world in November 2022, it gained 100 million users within just two months after its launch. The technology itself is fascinating, but part of what makes ChatGPT uniquely interesting is the fact that essentially overnight, most of the world gained access to a powerful generative artificial intelligence that they could use for their own purposes. We speak with researchers who study computer science, technology and economics to explore how the rapid adoption of technologies has, for the most part, failed to change social and economic systems in the past – but why AI might be different, despite its weaknesses.Featuring Daniel Acuña, Associate Professor of Computer Science, at the University of Colorado Boulder in the US, Kentaro Toyama, Professor of Community Information at the University of Michigan, also in the US, and Thierry Rayna, Professor of Innovation and Entrepeneurship Management, École polytechnique in France. This episode of The Conversation Weekly was produced by Katie Flood and Dan Merino, and also written by Katie Flood. Sound design is by Eloise Stevens, and our theme music is by Neeta Sarl. Mend Mariwany is the show's executive producer. Full credits for this episode are available here. Sign up here for a free daily newsletter from The Conversation.Further reading: AI could make more work for us, instead of simplifying our livesUnlike with academics and reporters, you can’t check when ChatGPT’s telling the truthI tried the Replika AI companion and can see why users are falling hard. The app raises serious ethical questions

An international team of biologists has discovered a tiny new species of owl, called the Príncipe scops owl, living in a remote forest on an island off the west coast of Africa.Featuring Bárbara Freitas, a Ph.D. fellow who studies bird evolution at the National Museum of Natural Sciences in Madrid.This episode was written and produced by Katie Flood and hosted by Dan Merino. The interim executive producer is Mend Mariwany. Eloise Stevens does our sound design, and our theme music is by Neeta Sarl.Full credits for this episode are available here. Sign up here for a free daily newsletter from The Conversation.Further reading: We discovered a new species of owl – but we already think it’s in dangerMini creatures with mighty voices know their audience and focus on a single frequency

Our dependence on fossil fuels is one of the biggest challenges to overcome in the fight against climate change. But production and consumption of fossil fuels is on the rise, and expected to peak within the next decade. We speak to two researchers who examine the political challenges of transitioning to a world after oil, and what it means for those states who rely on oil for resources.Featuring Caleb Wellum, Assistant Professor of U.S. History, at the University of Toronto in Canada, and Natalie Koch, Professor of Human Geography at the University of Heidelberg, in Germany. This episode of The Conversation Weekly was produced and written by Mend Mariwany who is also the show's executive producer. Sound design is by Eloise Stevens, and our theme music is by Neeta Sarl. Full credits for this episode are available here. Sign up here for a free daily newsletter from The Conversation.Further reading: For developing world to quit coal, rich countries must eliminate oil and gas faster – new studyCOP27 flinched on phasing out ‘all fossil fuels’. What’s next for the fight to keep them in the ground?Ending the climate crisis has one simple solution: Stop using fossil fuels

Social isolation and loneliness are increasingly becoming a societal problem, as they increase polarization and impact on our physical health. In 2018, two years before the pandemic, the United Kingdom created a ministerial portfolio for loneliness. Japan, where nearly 40 per cent of the population report experiencing loneliness, began a similar position in 2021. We speak to three researchers who invite us to more deeply consider loneliness and social isolation, and their impacts on our health and society. Featuring Ananya Chakravarti, an associate professor of the history of emotions at Georgetown University in Washington in the US, Julianne Holt-Lunstad, a professor of psychology and neuroscience at Brigham Young University in the US, and Kate Mulligan, an assistant professor at the Dalla Lana School of Health in Canada.This episode was produced by Mend Mariwany, who is also the show’s executive producer. Eloise Stevens does our sound design and our theme music is by Neeta Sarl. Full credits for this episode are available here. A transcript will be available soon. Sign up here for a free daily newsletter from The Conversation.Further reading: Why loneliness is both an individual thing and a shared result of the cities we createTechnology is alienating people – and it’s not just those who are olderPeople feel lonelier in crowded cities – but green spaces can help

Despite the many biological differences between people of different sexes, races, ages and life histories, chances are that if two people walk into a doctors office with the same symptoms, they are going to get the same exact treatment. As you can imagine, a whole range of treatments – from drugs to testing – could be much more effective if they were designed to work with many different kinds of bodies, not just some abstract, generic human. We speak to three researchers who are looking at ways to make medicine more precise. It starts with simply making sure that clinical trial participants look like the actual patients a drug is meant to treat. And in the future, precision medicine could help each person get medical care that is tailored to their own biology, just like a custom shirt.Featuring Jennifer Miller, professor of medicine at Yale University in New Haven, Connecticut, in the US, Julia Liu, professor of medicine at Morehouse School of Medicine in Atlanta, Georgia, in the US, and Keith Yamamoto, head of Precision Medicine at the University of California San Francisco in the US. This episode of The Conversation Weekly was produced and written by Katie Flood. Mend Mariwany is the show's executive producer. Sound design is by Eloise Stevens, and our theme music is by Neeta Sarl.  Full credits for this episode are available here. Sign up here for a free daily newsletter from The Conversation.Further reading: Yes, Black patients do want to help with medical research – here are ways to overcome the barriers that keep clinical trials from recruiting diverse populationsWomen are 50–75% more likely to have adverse drug reactions. A new mouse study finally helps explain why

During the COVID-19 pandemic, the demographics of cities shifted. As stay-at-home orders, remote work and bubbling reduced social interaction, and restaurants, venues and arts destinations shut down temporarily, people started reconsidering their decision to remain in a big city. We spoke with two urban theorists about why people were leaving larger cities for smaller ones, how authenticity was marketed using social media influencers, and why smaller and mid-sized cities are underrated.Featuring Avi Friedman, a professor of architecture at McGill University in Montréal, Canada, and David A. Banks, lecturer in the Department of Geography and Planning at the University of Albany in New York, US. This episode of The Conversation Weekly was produced and written by Mend Mariwany who is also the show's executive producer. Sound design is by Eloise Stevens, and our theme music is by Neeta Sarl.  Full credits for this episode are available here. Sign up here for a free daily newsletter from The Conversation.Further reading: Kampala, Kigali and Addis Ababa are changing fast: new book follows their distinct pathsTo build sustainable cities, involve those who live in themThe era of the megalopolis: how the world’s cities are mergingAs big cities get even bigger, some residents are being left behind

Whether you’re looking at tropical forests in Brazil, grasslands in California or coral reefs in Australia, it’s hard to find places where humanity hasn't left a mark. The scale of the alteration, invasion or destruction of natural ecosystems can be mindbogglingly huge. Thankfully, researchers, governments and everyday people around the world are putting more effort and money into conservation and restoration every year, but the task is large. How do you plant a billion trees? How do you restore thousands of square miles of wetlands? How do you turn a barren ocean floor back into a thriving reef? In some cases, the answer lies with certain animals – called ecosystem engineers – that can kick start the healing. We talk to three experts about how ecosystem engineers can play a key role in restoring natural places and why the human and social sides of restoration are just as important as the science.Featuring Josh Larsen, associate professor in water science at the University of Birmingham in the UK, Dominic McAfee, a postdoctoral researcher in marine ecology at the University of Adelaide in Australia, and Andy Kliskey, professor of landscape architecture and Co-director of the Center for Resilient Communities at the University of Idaho in the US.This episode was produced by Katie Flood. The executive producer is Mend Mariwany. Eloise Stevens does our sound design and our theme music is by Neeta Sarl. Full credits for this episode are available here. A transcript will be available soon. Sign up here for a free daily newsletter from The Conversation.Further reading: Beavers can do wonders for nature – but we should be realistic about these benefits extending to peopleBeavers are back: here’s what this might mean for the UK’s wild spacesPlaying sea soundscapes can summon thousands of baby oysters – and help regrow oyster reefsOnce the fish factories and ‘kidneys’ of colder seas, Australia’s decimated shellfish reefs are coming back

During the years of suffering and tragedy that defined the Warsaw Ghetto in the midst of World War II, a team of Jewish doctors secretly documented the effects of starvation on the human body when the Nazis severely limited the amount of food available in the Jewish ghetto.Featuring Merry Fitzpatrick, an assistant professor at Tufts University who studies food security and malnutrition.This episode was produced by Mend Mariwany and hosted by Dan Merino. The executive producer is Mend Mariwany. Eloise Stevens does our sound design, and our theme music is by Neeta Sarl.Further reading: Warsaw Ghetto’s defiant Jewish doctors secretly documented the medical effects of Nazi starvation policies in a book recently rediscovered on a library shelf Starving civilians is an ancient military tactic, but today it’s a war crime in Ukraine, Yemen, Tigray and elsewhere

Across the globe, health-care workers have gone on strike to protest the stress placed on them by the global COVID-19 pandemic and economic downturn, pushing already-strained services beyond their limits. These labour actions are part of the challenges faced by countries attempting to provide welfare services to their populations. We talk to three experts about why social welfare services are being cut, and what actions governments may need to take to ensure better access. Featuring Miguel Niño-Zarazúa, senior economics lecturer at the School of Oriental and African Studies in London in the UK,  Christine Corlet Walker, a research fellow at the Center for the Understanding of Sustainable Prosperity at the University of Surrey, also in the UK, and Erdem Yörük, assistant professor at Koç University in Istanbul in Turkey.This episode was produced by Mend Mariwany and Katie Flood. The executive producer is Mend Mariwany. Eloise Stevens does our sound design and our theme music is by Neeta Sarl. Full credits for this episode are available here. A transcript will be available soon. Sign up here for a free daily newsletter from The Conversation.Further reading: Better income assistance programs are needed to help people with rising cost of livingCOVID-19 holds lessons for the future of social protectionDegrowth: why some economists think abandoning growth is the only way to save the planet – podcast