The Conversation

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Channel • 21 Shows

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Science

Every two months
Physics

Physics

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News Commentary

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Nature

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Kids & Family

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News

News

Updated 06/04/2021
Politics

Politics

Updated 29 Apr

12/04/2023

Theory of everything: do we really need one?

The quest for a theory of everything – explaining all the forces and particles in the universe – is arguably the holy grail of physics. While each of our main theories of physics works extraordinarily well, they also clash with each other. But do we really need a theory of everything? And are we anywhere near achieving one? Featuring Vlatko Vedral, a professor of physics at the University of Oxford and Chanda Prescod-Weinstein, an assistant professor in physics and astronomy and core faculty in women's and gender studies at the University Of New Hampshire. This episode is 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: The standard model of particle physics may be broken – an expert explains

12/04/2023

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57 min
26 FEB

South Korea's birth rate is rising, but the population is still shrinking

South Korea’s very low birth rate and ageing population have long served as a cautionary tale for other governments worried that they’ll see similar demographic challenges. But now, for the second year running, more people in South Korea are having children. The 6.8% rise in births in 2025 is the largest rise since 2007, and has taken the country’s total fertility rate to 0.80, up from 0.75 in 2024. The news is being cautiously celebrated, but with South Korea’s overall population still shrinking, it is yet to reverse its demographic fortunes. In this episode, we speak to Stuart Gietel-Basten, a demographer and professor of social science and public policy at Hong Kong University of Science and Technology, about how South Korea has got to this point and some of the structural issues the country still faces. This episode was written and produced by Gemma Ware and Katie Flood. Mixing by Eleanor Brezzi and theme music by Neeta Sarl. Read the full credits for this episode and sign up here for a free daily newsletter from The Conversation. If you like the show, please consider donating to The Conversation, an independent, not-for-profit news organisation. Japan is not the only country worrying about population decline – get used to a two-speed worldChina’s population decline is a result of decades of botched family planning measures and will have global implicationsSouth Korea’s gender imbalance is bad news for men − outnumbering women, many face bleak marriage prospects Mentioned in this episode: The Making of an Autocrat Search "The Conversation Weekly" for our new series: The Making of an Autocrat. Is America watching its democracy unravel in real time? In The Making of an Autocrat from The Conversation, six of the world’s pre-eminant scholars reveal the recipe for authoritarian rule. From capturing a party, to controlling the military, Donald Trump is borrowing from the playbook of strongmen thoughout history. This is the story of how democracies falter — and what might happen next.

26 Feb

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28 min
09/12/2022

The inside story of the CIA v Russia

The inside story of the CIA v Russia – from cold war conspiracy to ‘black’ propaganda in Ukraine. Rhodri Jeffreys-Jones, a professor emeritus of American history at the University of Edinburgh, on what history tells us about the CIA's influence today. You can read the text version of this in-depth article here. The audio version is read by Sam Scholl in partnership with Noa, News Over Audio. Listen to more articles from The Conversation, for free, on the Noa app. The music in In Depth Out Loud is Night Caves by Lee Rosevere. In Depth Out Loud is produced by Gemma Ware. This story was edited by Mike Herd and came out of a project at The Conversation called Insights. You can read more stories in the series here.

09/12/2022

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30 min
18/05/2023

What is fair?

Should poorer countries be compensated for climate disasters that aren't their own making? The concept of "loss and damage" was debated at the United Nations COP27 climate summit in Egypt in November 2022 – which resulted in an historic agreement to establish a loss and damage fund to compensate countries that are most vulnerable to the impacts of climate change. In our final episode of Fear & Wonder, we hear from Senegalese meteorologist Aïda Diongue-Niang, who called us from COP27. She explains how African nations are already highly vulnerable to the impacts of climate change. She also takes us inside the gruelling final approval session of the IPCC's Synthesis Report. Her behind-the-scenes account reveals the dedication and determination of the scientists involved. We also hear from Mauritanian public health expert Guéladio Cissé, who details how more intense rainfall is already increasing the risk of water-borne and vector-borne diseases. Finally, we recap what we've learned throughout this podcast. We reflect on how the event that sparked its creation – the Australian Black Summer bushfires of 2019–20 – has inspired survivors to fight for climate action. In case you're new here: Fear & Wonder is a new climate podcast, brought to you by The Conversation. It takes you inside the United Nations’ era-defining climate report via the hearts and minds of the scientists who wrote it. The show is sponsored by the Climate Council, an independent, evidence-based organisation working on climate science, impacts and solutions. ... If you liked this episode, you might also like to subscribe to The Conversation's new Science Wrap newsletter: https://bit.ly/406nQgk. And if you really like the show, please consider donating to The Conversation – we're a non-profit newsroom who rely on the support of our readers to fund our expert-led journalism: https://bit.ly/42ABoCi. If you'd like to support the Climate Council and receive your free copy of Joelle's book Humanity's Moment, click here: https://bit.ly/40sQ4BP. Hosted on Acast. See acast.com/privacy for more information.

18/05/2023

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47 min
15/03/2023

Fundamental constants: is the universe fine tuned for life to exist?

Imagine a universe with extremely strong gravity. Stars would be able to form from very little material. They would be smaller than in our universe and live for a much shorter amount of time. But could life evolve there? It after all took human life billions of years to evolve on Earth under the pleasantly warm rays from the Sun. Now imagine a universe with extremely weak gravity. Its matter would struggle to clump together to form stars, planets and – ultimately – living beings. It seems we are pretty lucky to have gravity that is just right for life in our universe. Featuring Fred Adams, professor of physics, University of Michigan, and Paul Davies, professor of physics, Arizona State University. 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: The multiverse is suspiciously unlikely to exist unless it is one of many

15/03/2023

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42 min
23 APR

Israel’s history shapes how it wages war

In around ten minutes on April 8, the Israeli military hit more than 100 targets across Lebanon. Israel called the attack Operation Eternal Darkness and said it struck Hezbollah command and control centres. The Lebanese government said at least 300 people were killed and 1,000 injured. Israel has a powerful and lethal army, and it’s been defending itself against attacks from Hamas, Hezbollah and Iran. But why has it chosen such brutal military aggression? One historian, Yaron Peleg, believes the answer to this question lies in the early days of Zionism in the 19th century, when many Jews who arrived in Palestine were fleeing antisemitism in Europe. In defiance, they began a cultural revolution, emphasising military strength and honouring Biblical Jewish heroes. But in the wake of the Holocaust, Peleg, who is a professor of modern Hebrew studies at the University of Cambridge in the UK, thinks Israel’s view of itself began to change. He tracks how he sees Israel’s self‑image changed from self‑reliance to aggressive militarism, and how that history helps to explain the way it wages war today. This episode was produced by Mend Mariwany and the executive producer was Gemma Ware. Mixing by Eleanor Brezzi and theme music by Neeta Sarl. Read the full credits for this episode and sign up here for a free daily newsletter from The Conversation. If you like the show, please consider donating to The Conversation, an independent, not-for-profit news organisation. Mentioned in this episode: Voices of the South

23 Apr

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29 min
15 JAN

A new treaty to protect our oceans

In a moment being celebrated by global marine conservationists, a new UN high seas treaty comes into force on January 17 providing a new way to govern the world's oceans. The UN high seas treaty will allow for the creation of protected areas in international waters, like national parks. But the treaty has some grey areas – notably its powers to regulating fishing in international waters, and mining of the seabed. In this episode we speak to Callum Roberts, professor of marine conservation at the University of Exeter in the UK, about how the treaty came to be and the challenges now facing its implementation. This episode was written and produced by Mend Mariwany and Gemma Ware. Mixing by Michelle Macklem and theme music by Neeta Sarl. Read the full credits for this episode and sign up here for a free daily newsletter from The Conversation. If you like the show, please consider donating to The Conversation, an independent, not-for-profit news organisation. Global power struggles over the ocean’s finite resources call for creative diplomacyTargets to save 30% of the ocean by 2030 aren’t being met, new report revealsThe historic High Seas Treaty is almost reality. Here’s what it would mean for ocean conservationA landmark treaty could protect the high seas – and spark new conflicts

15 Jan

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22 min
5 MAR

Was the Gulf blindsided on Iran?

As Israel and the US continued to bomb Iran after killing the country's supreme leader Ali Khamenei, Iran lashed out at its neighbours with multiple drone strikes, including against the US embassy in Riyadh. Saudi Arabia and Iran have a long and bitter rivalry. Yet, in recent years, the Saudis had begun building new diplomatic relationship with Iran, even as they and other Gulf states continued to host American military bases, and court American investment. Now the Gulf states find themselves in the middle of the very regional conflict many of its leaders hoped to avoid. It's one which threatens longstanding efforts to cement the Gulf as a hub for finance, travel and tourism, and as an oasis of security. Were they blindsided? Or did some actually want the US to attack Iran? With the US and Israel seemingly calling the shots, what will the Gulf states do now? In today's episode, we speak to Simon Mabon, a professor of international relations at Lancaster University in the UK and expert in Saudi-Iran relations, about how the Gulf's delicate balancing act between the US and Iran came toppling down. This episode was written and produced by Mend Mariwany and Katie Flood. The executive producers was Gemma Ware. Mixing by Eleanor Brezzi and theme music by Neeta Sarl. Read the full credits for this episode and sign up here for a free daily newsletter from The Conversation. If you like the show, please consider donating to The Conversation, an independent, not-for-profit news organisation. Mentioned in this episode: The Making of an Autocrat Search "The Conversation Weekly" for our new series: The Making of an Autocrat. Is America watching its democracy unravel in real time? In The Making of an Autocrat from The Conversation, six of the world’s pre-eminant scholars reveal the recipe for authoritarian rule. From capturing a party, to controlling the military, Donald Trump is borrowing from the playbook of strongmen thoughout history. This is the story of how democracies falter — and what might happen next.

5 Mar

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29 min
29/03/2023

Quantum mechanics: does objective reality exist?

It is hard to shake the intuition that there's a real and objective physical world out there. If I see an umbrella on top of a shelf, I assume you do too. And if I don't look at the umbrella, I expect it to remain there as long as nobody steals it. But the theory of quantum mechanics, which governs the micro-world of atoms and particles, threatens this commonsense view. Featuring Chiara Marletto, Research Fellow of Physics, and Christopher Timpson, Professor of Philosophy of Physics, both at the University of Oxford, and Marcus Huber, Professor of Physics, TU Wien. This episode is 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: 'QBism': quantum mechanics is not an objective description of reality – it reveals a world of genuine free will

29/03/2023

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53 min
19 MAR

How the US cloned Iran's drones

The day after the US began bombing Iran, US Central Command confirmed it had used a new, cheap type of kamikaze drone called a Lucas for the first time in a combat operation. These drones were made in America, but their roots actually lie in Iran – they are reverse engineered copies of an Iranian drone called a Shahed that the Russians have also been using to bomb Ukraine. In this episode, PhD researcher and military expert Arun Dawson at King's College London explains how the Iranians developed the Shaheds, why the US decided to copy them, and what role these low-cost drones might play in the future of warfare. This episode was written and produced by Mend Mariwany and Gemma Ware was the executive producer. Mixing by Eleanor Brezzi and theme music by Neeta Sarl. Read the full credits for this episode and sign up here for a free daily newsletter from The Conversation. If you like the show, please consider donating to The Conversation, an independent, not-for-profit news organisation. Not just Patriot interceptors: A defense expert explains the various weapons US and allies use to defend against missiles and dronesDrones over Ukraine: What the war means for the future of remotely piloted aircraft in combatIran war shows how AI speeds up military ‘kill chains’The US is using repurposed Iranian drone technology to attack Iran – a military expert explains why Mentioned in this episode: The Making of an Autocrat Search "The Conversation Weekly" for our new series: The Making of an Autocrat. Is America watching its democracy unravel in real time? In The Making of an Autocrat from The Conversation, six of the world’s pre-eminant scholars reveal the recipe for authoritarian rule. From capturing a party, to controlling the military, Donald Trump is borrowing from the playbook of strongmen thoughout history. This is the story of how democracies falter — and what might happen next.

19 Mar

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28 min

Listen to experts explain the world around us and tell the stories behind brand new research. Podcasts from The Conversation, an independent source of news and views, sourced from the academic and research community. Shows in English, French and Bahasa Indonesia. Free to listen.