More or Less

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MATHEMATICS
EVERY TWO WEEKS

Tim Harford explains - and sometimes debunks - the numbers and statistics used in political debate, the news and everyday life

5 DAYS AGO

Is this Premier League striker a secret maths genius?

Chelsea striker Liam Delap has recently stunned fans on Instagram by apparently doing incredibly complicated calculations in his head, finding what’s known as the cube root of some very large numbers. But is he really a human calculator? Or is there something else going on? Tim Harford speaks to Rob Eastaway, mathematician and author of ‘Maths on the Back of an Envelope’ to learn about the trick you can use to pull this off - and while he’s here we also ask him about the trend of more goals being scored in the Premier League. Presenter: Tim Harford Producers: Nathan Gower Series Producer: Tom Colls Editor: Richard Vadon Programme Coordinator: Brenda Brown Sound Engineer: James Beard Credit: Video of Liam Delap from Chelsea’s Instagram account, chelseafc

9 min
31 JAN

Could Europe use its financial muscle to strong-arm the US?

Could European Nato members use their large holdings of US shares and bonds to put pressure on America? It’s a question that some in Europe found themselves asking as the geopolitical crisis over Greenland escalated and leaders desperately tried to think of ways to dissuade Donald Trump. It is true that trillions of dollars of American financial assets are held in Europe. But the devil, as ever, is in the detail. Tim Harford talks to Toby Nangle, a journalist with the Financial Times, to drill down into the numbers. Presenter: Tim Harford Producer: Nathan Gower Series Producer: Tom Colls Editor: Richard Vadon Programme Coordinator: Brenda Brown Sound Engineer: James Beard

9 min
28 JAN

Can you get £71,000 on benefits?

Tim Harford investigates some of the numbers in the news. This week: Is it true that someone needs to earn £71,000 before they receive more money than a family on benefits? Did Canadian prime minister Mark Carney get the GDP of Canada and the Nordic countries wrong? Are 1990s pop icons Right Said Fred right about what they said about church attacks? Is a sauna really ten times as hot as Wales in the winter? And Tim hits the science lab treadmill to find out if he can run a four-hour marathon. If you’ve seen a number in the news you want the team on More or Less to have a look at, email moreorless@bbc.co.uk Contributors: Gareth Morgan, benefits expert and author of the Benefits in the Future blog Joe Shalam, policy director of the Centre for Social Justice Professor Kelly Morrison, head of physics at Loughborough University Dr Danny Muniz, a senior lecturer in Exercise Physiology at the University of Hertfordshire Credits: Presenter: Tim Harford Reporters: Nathan Gower, Lizzy McNeill and Tom Colls Production co-ordinator: Brenda Brown Sound mix: Gareth Jones and James Beard Editor: Richard Vadon

29 min
24 JAN

Is Greenland as big as Africa?

The vast island of Greenland has found itself at the centre of a geopolitical crisis. But a little bit of geography can help us see the situation in a new light. YouTuber and map expert Jay Foreman explains how Mercator maps - the maps that the vast majority of us use to understand the world - contain necessary but massive distortions and hugely exaggerate the size of the Arctic island. So, why is making a flat map of a round globe so difficult? Why did we end up with a problematic map in the first place? And are there any alternatives? Presenter: Tim Harford Producer: Nathan Gower Series Producer: Tom Colls Editor: Richard Vadon Programme Coordinator: Brenda Brown Sound Engineer: James Beard

9 min
21 JAN

How close is Greenland to the United States?

Tim Harford investigates some of the numbers in the news. This week: How far away is Greenland from the United States? We check a number From Our Own Correspondent. Does converting our entire energy system to be carbon neutral come with a £7.6 trillion price tag? Is the inevitable rise of house prices in the UK not so inevitable after all? Can the great mathematicians of history answer the question of the hour: how to play The Traitors? If you’ve seen a number in the news you want the team on More or Less to have a look at, email moreorless@bbc.co.uk Contributors: Jay Foreman, one half of YouTube duo the Map Men Mike Thompson, chief economist of the National Energy System Operator David Turver, author of The Cost of Net Zero, a report from the Institute of Economic Affairs Neal Hudson, housing market analyst and founder housing research website BuiltPlace Dr Kat Phillips, mathematician and Innovation research associate at the University of Warwick, Traitors aficionado Credits: Presenter: Tim Harford Reporter: Tom Colls Producers: Nathan Gower and Lizzy McNeill Production co-ordinator: Brenda Brown Sound mix: James Beard Editor: Richard Vadon

29 min
17 JAN

No, a study has not shown that the covid jab causes cancer

In Autumn 2025 a paper in South Korea was published that excited many a vaccine sceptic online. The paper claimed that receiving a vaccination against Covid19 was linked to a 27% increase in cancer risk. However, when you dig into the data there is no evidence that the vaccine caused the cancer. We spoke to Professor Justin Fendos to explain why we cannot take this type of statistical analysis at face value. Presenter: Tim Harford Producer: Lizzy McNeill Series Producer: Tom Colls Editor: Richard Vadon Production Coordinator: Brenda Brown Sound Mix: James Beard

9 min
14 JAN

Have more than 100 private schools been forced to close because of VAT?

Tim Harford investigates some of the numbers in the news. This week: A headline in the Mail says more than 100 private schools have closed since Labour came to power and ended the VAT exemption for private schools. Is that number right? Is it true that when Covid hit the UK, a one-week delay in imposing lockdown led to 23,000 deaths? Do 10 million families rely on X as their main source of news? That’s what government spokesperson Baroness Ruth Anderson said in the House of Lords, but is it correct? s there really a “quiet revival” of Christian worship? Two YouGov polls found churchgoing had gone up by 50% between 2018 and 2024 in England and Wales. New polling data suggests otherwise. If you’ve seen a number in the news you want the team on More or Less to have a look at, email moreorless@bbc.co.uk Contributors: Professor Sir David Spiegelhalter, Emeritus Professor of Statistics in the Statistical Laboratory, University of Cambridge Professor Sir John Curtice, Senior Research Fellow at the National Centre for Social Research Credits: Presenter: Tim Harford Reporters: Tom Colls and Nathan Gower Producers: Charlotte McDonald and Lizzy McNeill Production co-ordinator: Brenda Brown Sound mix: Gareth Jones Editor: Richard Vadon

28 min
10 JAN

Does Venezuela really have the biggest oil reserves in the world?

When people think of oil rich nations their mind generally goes to Saudi Arabia, Iraq and the US. But according to international statistics, the country with the largest oil reserves is Venezuela, with 300 billion barrels worth. At their peak they produced over 3.5 million barrels of the stuff per day. However, due to lack of investment, sanctions and mismanagement that peak is long gone. Following their military intervention, the US administration claims they can get Venezuela's oil production up and running at full capacity within 18 months. But can they, and why is it that estimates for other countries oil reserves have fluctuated but Venezuela’s has stayed at 300 billion barrels for over two decades? Presenter: Tim Harford Producer: Lizzy McNeill Series Producer: Tom Colls Editor: Richard Vadon Production Co-Ordinator: Brenda Brown Sound Mix: Dave O’Neill

9 min

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DAILY NEWS
They steal billions: Cyber Hack investigates the alleged cyber gangs and the heists and hacks they’re accused of carrying out. No one is said to be safe. From Hollywood studios, to international banks, from crypto exchanges to small businesses and health care companies, law enforcement agencies say they cause chaos around the globe. Who will be next? And where is the money going? Latest season: Evil Corp. The Russian Evil Corp is accused of being a family crime gang, responsible for stealing hundreds of millions of dollars. Law enforcement agencies say they are “the most pervasive cybercrime group to ever have operated”. No one is off limits – not even a group of nuns in Chicago. Previously on Cyber Hack: The Lazarus Heist. This hacking group is said to be behind the biggest crypto heist in history, stealing billions of dollars in the process. Investigators blame North Korea’s state-backed hackers The Lazarus Group, and say the stolen money is being used to finance its nuclear weapons and missile development programs. Pyongyang denies involvement. Among the Lazarus Group’s many targets are Hollywood’s Sony Entertainment and the Bank of Bangladesh. ATMs are cleaned out of money, while its operatives live double lives in a hacker hotel. But where does the money trail lead?

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TRUE CRIME
NEW in The History Bureau - Putin and the Apartment Bombs In September 1999, just weeks after a 46-year-old Vladimir Putin became Prime Minister, four bombs blew up four apartment buildings across Russia, killing hundreds of people while they slept. The attacks plunged the country into panic. Families fled their homes. Residents patrolled their blocks around the clock. An entire nation paralyzed by fear. But who did it? It's a mystery that has fuelled some chilling theories. The government blamed Chechen militants. Many reporters agreed. But then the whispers started. Was something even more sinister going on? Over 25 years later, journalists who covered the bombings still can't agree on who planted the explosives or why. Presenter Helena Merriman returns to the story with the reporters who were there on the ground. What did they get right first time around? And, in the chaos and confusion of unfolding events, what did they miss? The History Bureau revisits the defining stories of our times with the reporters who first covered them.

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HISTORY
A weekly programme that illuminates the mysteries and challenges the controversies behind the science that's changing our world.

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SCIENCE
Global investigations from the BBC. Uncovering gripping stories from around the world and telling them episode by episode. Delve into a World of Secrets. Latest season: Somewhere in America, a twelve year old girl is being abused in her own home - photographs of it are being shared to a vast community of child abusers on the ‘dark web’ — an encrypted corner of the internet where users are untraceable. But, hidden amongst them, are two men whose job it is to try and find her: US Special Agents Greg Squire and Pete Manning. For over seven years, BBC Eye journalist Sam Piranty has been granted rare access to follow their work - observing the extraordinary lengths they will go to hunt down offenders and rescue children. Every detail matters, and every decision has consequences. They will not look away. The race is on. Also, previously on World of Secrets: The Child Cancer Scam: Millions of dollars are donated to help kids with cancer but families never see the money. Death in Dubai: A woman falls from a tower block and her name starts trending. But behind the online rumours lies an even darker reality. And the Abercrombie Guys: Investigating sexual exploitation claims against the former CEO of fashion giant Abercrombie & Fitch.

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DOCUMENTARY
The latest business and finance news from around the world, on the BBC.

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BUSINESS NEWS