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Physics

Physics

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Nutrition

Nutrition

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News Commentary

Every two months
Kids & Family

Kids & Family

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News Commentary

Updated 27/03/2025
Nature

Nature

Updated weekly

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
08/03/2023

Is time an illusion?

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

08/03/2023

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44 min
4 JAN

The Making of an Autocrat: co-opt the military

In November, six Democratic lawmakers recorded a video directed at members of the US military and intelligence agencies. In it, they issued a blunt reminder: "The laws are clear: you can refuse illegal orders. […] You must refuse illegal orders." The lawmakers were issuing the warning against the backdrop of US airstrikes on boats off the coast of Latin America the Trump administration claims are suspected drug runners. Many Democrats and legal experts, however, argue these strikes are illegal. Since returning to office, Trump has successfully expanded his power over his own party, the courts and the American people. Now, like many autocrats around the world, he’s trying to exert control over the military. In the final episode of The Making of an Autocrat, Joe Wright, a political science professor at Penn State University, says: "I am very concerned that getting the military to do illegal things will not only put US soldiers at more risk when they do engage in international missions in the future […] it’s a first step to using the military to target domestic political opponents. That’s what really worries me." This episode was written by Justin Bergman and produced and edited by Isabella Podwinski and Ashlynne McGhee. Sound design by Michelle Macklem.

4 Jan

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18 min
04/12/2025

Why the US is fixated on South Africa’s white Afrikaners

Donald Trump’s fixation on South Africa’s white Afrikaner minority has become a central plank of US refugee policy, with their applications now given priority under a new refugee system. This preoccupation by some Americans with white Afrikaners has a long history dating back to the publication of a large sociological study focusing on poor white Afrikaners in the 1930s. In this episode, we speak to Carolyn Holmes, an assistant professor of political science at the University of Tennessee, Knoxville, to trace the history of the links between white nationalists in the US and South Africa. This episode was produced by Gemma Ware, Mend Mariwany and Katie Flood. 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. Trump and South Africa: what is white victimhood, and how is it linked to white supremacy?The South African apartheid movement’s close relationship with the American right – then and nowTrump’s white genocide claims about South Africa have deep roots in American historyDonald Trump, white victimhood and the South African far-right 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.

04/12/2025

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30 min
27/11/2025

The 40 scientists who decide which flu shot you'll get

Twice a year, 40 scientists gather together for five days to decide what strains of influenza to vaccinate against for the next flu season. It takes around six months to prepare the vaccine – which usually includes protection against three different strains of flu. Europe and the US are heading into a flu season that some are warning could be particularly severe this winter. While even as summer approaches in Australia, the country is still registering high numbers of cases after a record-breaking flu season earlier in the year. So how does the process of deciding on a flu vaccine each year actually work? And does what happens in the southern hemisphere influence the way the virus circulates in the northern hemisphere? In this episode, we speak to Ian Barr, deputy director for the WHO Collaborating Centre for Reference and Research on Influenza, based at the Peter Doherty Institute for Infection and Immunity, part of the University of Melbourne. Barr is one of those 40 scientists who attend the meetings to decide what strains to focus vaccination efforts on. This episode was produced by Mend Mariwany, Katie Flood 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. First human bird-flu death from H5N5 – what you need to knowFlu season has arrived – and so have updated flu vaccinesFlu season has started early in the UK – here’s what might be going on 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.

27/11/2025

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26 min
28/12/2025

The Making of an Autocrat: beat the courts

In democratic systems, the courts are a vital check on a leader’s power. They have the ability to overturn laws and, in Donald Trump’s case, the executive orders he has relied on to achieve his goals. Since taking office, Trump has targeted the judiciary with a vengeance. He has attacked what he has called “radical left judges” and is accused of ignoring or evading court orders. The Supreme Court has already handed the Trump administration some key wins in his second term. But several cases now before the court will be pivotal in determining how much power Trump is able to accrue – and what he’ll be able to do with it. As Paul Collins, a Supreme Court expert from the University of Massachusetts-Amherst, explains in episode 4 of The Making of an Autocrat: "It’s all about presidential power. And that’s really significant because it’s going to enable the president to basically inject a level of politics into the federal bureaucracy that we frankly haven’t really seen before in the US." This episode was written by Justin Bergman and produced and edited by Isabella Podwinski and Ashlynne McGhee. Sound design by Michelle Macklem.

28/12/2025

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17 min
4 JAN

The Making of an Autocrat: suppress the people

The list of people Donald Trump has punished or threatened to punish since returning to office is long. It includes the likes of James Comey, Letitia James, John Bolton, as well as members of the opposition, such as Adam Schiff, Mark Kelly and Kamala Harris. In fact, he has gone so far as to call Democrats “the enemy from within”, saying they are more dangerous than US adversaries like Russia and China. According to Lucan Way, a professor of democracy at the University of Toronto, when a leader attacks the opposition like this, it’s a clear sign a country is slipping into authoritarianism. As Way says in episode 5 of The Making of an Autocrat: "In other kind of countries with weaker justice systems, you can literally jail members of opposition or bankrupt them. In a country like the United States, where the rule of law is quite robust, this is not possible, you can’t just jail rivals at will." But Trump has other ways of making the cost of opposing him too high for his critics to bear. This includes investigations, lawsuits, audits, personal attacks – anything to distract and silence them. The effect is his opponents become much more reluctant to engage in behaviour they know that Trump won’t like, Way says: "So it really has this kind of broader silencing effect that I think is quite pernicious." This episode was written by Justin Bergman and produced and edited by Isabella Podwinski and Ashlynne McGhee. Sound design by Michelle Macklem.

4 Jan

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15 min
28/12/2025

The Making of an Autocrat: hijack a party

We used to have a pretty clear idea of what an autocrat was. History is full of examples: Adolf Hitler, Joseph Stalin, Mao Zedong, along with Vladimir Putin and Xi Jinping today. The list goes on. So, where does Donald Trump fit in? In this six-part podcast series, The Making of an Autocrat, we are asking six experts on authoritarianism and US politics to explain how exactly an autocrat is made – and whether Trump is on his way to becoming one. This episode was written by Justin Bergman and produced and edited by Isabella Podwinski and Ashlynne McGhee. Sound design by Michelle Macklem.

28/12/2025

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17 min
28/12/2025

The Making of an Autocrat: manufacture a crisis

Donald Trump has sounded the alarm, over and over again, that the United States is facing an “invasion” by dangerous gang members. He blames immigrants for the country’s economic problems and claims protesters are destroying US cities. Trump is not the first would-be autocrat to manufacture a crisis to seize extraordinary powers. As Natasha Lindstaedt, an expert in authoritarian regimes at the University of Essex, says in episode 3 of The Making of an Autocrat, a strongman “loves a crisis”. "A crisis is the way that they mobilise their base, the way that they can depict themselves as the saviour, as this messianic type of figure that is going to save people from this chaotic world." So, is the United States really facing a national emergency? Or is this just a tactic on Trump’s part to amass more power? This episode was written by Justin Bergman and produced and edited by Isabella Podwinski and Ashlynne McGhee. Sound design by Michelle Macklem.

28/12/2025

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14 min
28/12/2025

The Making of an Autocrat: recruit an architect

Every autocrat needs a clan of loyalists, strategists, masterminds – these are the figures behind the scenes pulling the strings. They’re unelected and unaccountable, yet they wield a huge amount of power. This is the role Stephen Miller has played for Donald Trump – he is the architect in chief for the second Trump administration. He has so much power, in fact, he’s reportedly referred to as the "prime minister." So who is Stephen Miller? And why are architects so important in helping a would-be autocrat amass power? As Emma Shortis, a Trump expert and an adjunct senior fellow at RMIT University in Melbourne, explains in episode 2 of The Making of an Autocrat: "[Miller] is the kind of brains behind particularly Trump's hardline stances on immigration and the Trump administration's ability to use the levers of power, and expand the power available to the president. I think what Stephen Miller demonstrates and, and history has demonstrated over and over again is that autocrats cannot rise to power by themselves. They often require a singular kind of charisma and a singular kind of historical moment, but they also need architects behind them who are able to facilitate their rise to power." This episode was written by Justin Bergman and produced and edited by Isabella Podwinski and Ashlynne McGhee. Sound design by Michelle Macklem.

28/12/2025

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16 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.