Oecusse, a rugged, remote district of Timor-Leste in south-east Asia, is usually a pretty sleepy place. But in August, Oecusse was rocked by a large police raid on a suspected scam centre, later linked by a UN report to organised crime networks running scamming operations across south-east Asia.

And then in early September, a Facebook post by one of Timor-Leste’s highest political officials made some explosive allegations about a murky criminal underworld trying to get a foothold in the country.

In this episode, we speak to Michael Rose, an anthropologist and adjunct lecturer at the University of Adelaide who has lived and worked in Timor-Leste, about how Asia’s scamming gangs set their sights on Timor-Leste as their next frontier – and the movement to keep them out.

This episode was written and produced by Katie Flood and Gemma Ware with assistance from Mend Mariwany. Mixing by Michelle Macklem and theme music by Neeta Sarl. Gemma Ware is the executive producer. 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.

• Cambodia is vowing to ‘rid’ the country of scam compounds. But we’ve seen several still operating in the open
• Listen to episode 1 of Scam Factories '‘It seemed like a good job at first’: how people are trafficked, trapped and forced to scam in Southeast Asia'
• Scam Factories: read the series on The Conversation
• Organised crime may be infiltrating Timor-Leste’s government. One minister is sounding the alarm

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 now
• Trump’s white genocide claims about South Africa have deep roots in American history
• Donald Trump, white victimhood and the South African far-right

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 know
• Flu season has arrived – and so have updated flu vaccines
• Flu season has started early in the UK – here’s what might be going on

As Pakistanis and Indians struggle with hazardous air quality, in Beijing – a city once notorious for its smog – the air quality is currently rated as good.

Ahead of the 2008 Beijing Olympics, the Chinese government was so concerned about pollution that it introduced temporary restrictions on cars, shut down factories and work on some construction sites. It would take a few more years before the Chinese government implemented a clean air action plan in 2013. Since then, China has achieved a dramatic improvement in its air quality.

In this episode, we speak to Laura Wilcox, a professor at the National Centre for Atmospheric Science at the University of Reading in the UK, to understand how China managed to clean up its air pollution. But Wilcox’s recent research uncovered some unintended consequences from this cleaner air for the global climate: the pollution was actually helping to cool the atmosphere and by taking it away, it may have accelerated global warming.

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.

• Solar geoengineering: the risks and distractions of trying to reflect sunlight to cool the Earth – podcast
• Delhi: how weather patterns and faraway mountains made this the world’s most polluted megacity
• Cleaner air in east Asia may have driven recent acceleration in global warming, our new study indicates

Since the 1960s, scientists have been developing and honing models to understand how the earth’s climate is changing. One such pioneer of early climate modelling is Syukuro Manabe, who won the Nobel prize in physics in 2021 for his work laying the foundation for our current understanding of how carbon dioxide affects global temperatures. A seminal paper he co-published in 1967 was voted the most influential climate science paper of all time.

In this episode,  we speak to Nadir Jeevanjee, a researcher at the same lab in the National Oceanic and Atmospheric Administration where Manabe once worked, to look at the history of these early climate models, and how many of their major predictions have stood the test of time.

And yet, as climate negotiators gather in the Brazilian city of Belem on the edge of the Amazon for the Cop30 climate summit, the data sources that climate scientists around the world rely on to monitor and model the climate are under threat from funding cuts by the Trump administration.

This episode was produced by Mend Mariwany, Katie Flood and 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.

• How to find climate data and science the Trump administration doesn’t want you to see
• The most influential climate science paper of all time
• 5 forecasts early climate models got right – the evidence is all around you

At dawn on October 28, residents of Rio de Janeiro woke to the sound of gunfire. Battles continued throughout the day in the favelas of Alemão and Penha, as police mounted a huge operation targeting the Commando Vermelho, or the Red Command, one of Brazil’s largest organised criminal gangs.

In the days that followed, as graphic images showed lines of bodies on the streets, it emerged that at least 115 civilians and four police officers had been killed, making it the most violent police operation in Brazilian history.

In this episode, we speak to Robert Muggah, founder of the Institute Igarapé and a research collaborator at the Brazil LAB at Princeton University, about how organised crime become so deeply embedded in Brazil – and if there's a better way to confront it.

This episode was produced by Mend Mariwany, Katie Flood and 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.

• Análise: O crime organizado se tornou o maior negócio do Brasil - e sua mais séria ameaça
• Read more about the Cop30 climate summit in Belem, Brazil
• The rise of Brazil’s fuel mafias and their gas station money laundering machines

In the 16th century, witches and demons weren’t just for Halloween. People were terrified and preoccupied with them – even kings.

In 1590, James VI of Scotland – who was later also crowned James I of England – travelled by sea to Denmark to wed a Danish princess, Anne. On the return journey, the fleet was hit by a terrible storm and one of the ships was lost.

James, a pious Protestant who would go on to sponsor the translation of the King James bible, was convinced he’d been the target of witchcraft. A few years later, James decide to write a treatise called Daemonologie, setting out his views on the relationship between witches and their master, the devil.

Meanwhile, another firm Halloween favourite – ghosts – had fallen out of favour in the wake of the Protestant Reformation because they were seen as a hangover from Catholicism.

In this episode, Penelope Geng, an associate professor of English at Macalester College in the US who teaches a class on demonology, takes us back to a time when beliefs around witches, ghosts and demons were closely tied to religious politics. She explains how these beliefs have come to influence the way witches and ghouls have been portrayed in popular culture ever since.

This episode was produced by Mend Mariwany and Katie Flood with mixing by Eleanor Brezzi. Theme music by Neeta Sarl. Gemma Ware is the executive producer. 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.

• From printing presses to Facebook feeds: What yesterday’s witch hunts have in common with today’s misinformation crisis
• Samhain: the true, non-American origins of Halloween
• What’s the difference between ghosts and demons? Books, folklore and history reflect society’s supernatural beliefs

One American company called Strategy owns more than 3% of all bitcoin in existence. In August 2020, its executive chairman, Michael Saylor, pioneered a new business model where publicly listed companies buy cryptocurrency assets to hold on their balance sheet.

More than 100 other public companies have since followed Saylor’s lead and become bitcoin treasury companies, together holding more than $114 billion of bitcoin. There’s been a new rush into crypto treasury assets in 2025 following the general crypto enthusiasm of the new Trump administration.

But holding bitcoin assets also comes with some big risks, particularly given the volatility of cryptocurrency prices, and the share prices of some of these companies are now coming under pressure.

In this episode, we speak to Larisa Yarovaya, director of the centre for digital finance at the University of Southampton in the UK, about whether bitcoin treasury companies are the future of corporate finance, or another speculative bubble waiting to burst.

This episode was produced by Mend Mariwany and Gemma Ware with assistance from 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.

• Cryptocurrency’s transparency is a mirage: New research shows a small group of insiders influence its value
• Bitcoin: why a wave of huge companies like Tesla rushing to invest could derail the stock market
• Could digital currencies end banking as we know it? The future of money