More or Less

A new study led by Imperial College in London suggests that data from loyalty card spending in supermarkets and pharmacies could be used as a way of detecting ovarian cancer much earlier. Tim Harford discusses the findings with Professor Hannah Fry, who was most recently on the show talking about her own experience with cancer.

Has trade with the EU increased since Britain left the European Union? Tim Harford and the team look at a claim suggesting just that. There’s a row over the renaming of a street in North London previously called Black Boy Lane – but how much has it really all cost? Also are there more pensioners in “millionaire households” than pensioners in poverty. And mathematician Hannah Fry talks about a new study suggesting cases of ovarian cancer can be detected by looking at spending on loyalty cards.

A widely respected and cited study says humans and livestock account for 96% of all mammals on Earth. We ask how the study was carried out and what hope there might be for the future. Plus we answer another listener question about whether most mammals are in fact rodents. With the help of Dr Hannah Ritchie, Deputy Editor at Our World in Data and Dr Axel Rossberg, Reader in Theoretical Ecology at Queen Mary University of London.

Jeremy Hunt has pledged in a new social media video to halve the UK’s high rate of inflation. Tim Harford and the team fact check the Chancellor’s claims. Also – CPI, CPIH, RPI – which measure of inflation is best for assessing the impact of the rising cost of living? Plus has the number of GPs in England gone up or down since the start of the pandemic. And does toilet paper cause 15% of global deforestation?Presenter: Tim Harford Series Producer: Jon Bithrey Reporters: Josephine Casserly, Nathan Gower, Louise Hidalgo, Charlotte McDonald Sound Engineer: James Beard Production Co-ordinator: Helena Warwick-Cross Editor: Richard Vadon

A British company has claimed that the production and use of toilet paper is responsible for 15% of deforestation globally. We investigate the claim and ask what the true environmental cost of toilet paper is. Charlotte McDonald talks to climate change scientist Professor Mary Gagen, chief adviser on forests to the World Wide Fund for Nature, the WWF.Presenter: Charlotte McDonald Producer: Louise Hidalgo and Jon Bithrey Editor: Richard Vadon Production Coordinator: Helena Warwick-Cross Studio Engineer: Rod Farquhar

How long are people really waiting when they call 999 for an ambulance? Tim Harford and the team examine in detail the sheer scale of delays in responding to emergency calls. We also ask why the NHS is facing a crisis when it’s got more funding and more staff than before the pandemic, with the help of Ben Zaranko from the Institute for Fiscal Studies. Plus we fact check a claim from one of Britain’s leading teaching unions about pay. And are there more pubs in Ireland or Irish pubs in the rest of the world?Presenter: Tim Harford Series producer: Jon Bithrey Reporters: Josephine Casserly, Nathan Gower, Paul Connolly Sonic Landscape: James Beard Production Co-ordinator: Helena Warwick-Cross Editor: Richard VadonImage: Andy Rain/EPA-EFE/REX/Shutterstock

How did an edition of More or Less from 2017 end up influencing the choice of official names for extremely large numbers? We tell the tale of how an interview between presenter Tim Harford and maths whizz Rob Eastaway did just that. Also featuring Professor Richard Brown, head of metrology at the UK’s National Physical Laboratory.Presenter: Tim Harford Producer: Jon Bithrey Editor: Richard Vadon Production Coordinator: Janet Staples Sound Engineer: James BeardImage: Large number, Credit: Getty Images

Tim Harford and the team return for a new series of the number crunching show. With the huge pressures facing the NHS we ask how many people may be dying because of treatment delays in A&E. We hear what the latest census tells us about changing religious identity in Northern Ireland. We look at misleading claims about covid vaccines after the collapse of American football player Damar Hamlin. And we hear how More or Less has wielded its influence over how we all describe very large numbers.Presenter: Tim Harford Series producer: Jon Bithrey Reporters: Nathan Gower, Louise Hidalgo, Charlotte McDonald Production Coordinator: Brenda Brown Sound Engineer: James Beard

When the pandemic took hold, the Chinese government imposed a zero-Covid policy that aimed to contain the virus through mass-testing and strict lockdowns. But early in December, amidst widespread public protests and the spread of the omicron variant to more than 200 cities, those draconian, highly restrictive measures were lifted almost entirely. For the first time in just under two years, the majority of the country’s near one-and-a-half billion citizens were free to meet, mix and mingle where they pleased, triggering what experts believe is a gargantuan wave of covid infections and related deaths. Some analysts say death rates could be as high as15,000 per day. But the Chinese authorities are reporting five or fewer deaths a day. The numbers don't stack up so More or Less's Paul Connolly speaks to some of the world's leading experts and epidemiologists to work out if China's data on covid deaths can be trusted - and, if not, what the real death toll could be.

It's possible that the question we focus on in this week's programme occurred to you as you were sipping on an Irish Coffee in Bubbles O'Leary's in Kampala, Uganda: Where can the most Irish pubs be found - in Ireland? Or in all other countries combined? The popularity and sheer ubiquity of Irish pubs is a thing to behold. In 2015, the Irish Pubs Global Federation said there was approximately 6500 Irish pubs doing business outside the Emerald Isle - and our own research tells us there's at least one Irish bar in more than 160 of the world's 195 countries. But what is the secret, the recipe for global success? And can the More or Less team track down a definite number, thus answering the question some of you will have pondered whilst settling into a firelit Irish bar on a scorching hot day in rural Hawaii.

Tim Harford discusses the numbers that help explain some of the biggest stories of the year, including the war in Ukraine, soaring inflation and a breakthrough for women’s football, with the help of Olga Ivshina, correspondent for the BBC Russian service; Chris Giles, economics editor of the Financial Times; Linda Bauld, professor of public health at the University of Edinburgh and Georgina Sturge, author and House of Commons statistician.

The World Cup in Qatar is drawing to a close. Penalties and penalty shootouts have provided some of the biggest moments of the tournament. We analyse penalty data from the World Cup and ask what boosts the chance of scoring from the spot, with the help of Ben Lyttleton, author of Twelve Yards: The Art and Psychology of the Perfect Penalty.

Why are good data so important to policymakers – whether they know it or not – and what happens when good data is missing? Presenter Tim Harford speaks to Georgina Sturge, a statistician at the House of Commons library in London and the author of Bad Data: How Governments, Politicians and the Rest of Us Get Misled by Numbers.

Qatar has been fiercely criticised over its treatment of migrant workers, many of whom have been employed to build stadiums and other infrastructure in preparation for the 2022 World Cup. We look at the wildly varying estimates of the number of migrant deaths with the help of Max Tunon, head of the Qatar office of the International Labour Organisation and Steve Cockburn, head of economic and social justice at Amnesty International.

Somalia is experiencing its worst drought for 40 years and there are warnings that millions of people need food assistance urgently. The UN body tasked with classifying levels of food security has projected a famine, although no official declaration has yet been made. We ask what data is used to formally categorise famine and explore some of the difficulties in collecting it, with the help of UN IPC Global Programme Manager Jose Lopez and Professor Laura Hammond, Pro Director of Research & Knowledge Exchange at SOAS. Presenter & producer: Jon Bithrey Editor: Simon Watts Production Coordinator: Jacqui Johnson Sound Engineer: James Beard(Image: People affected by the worsening drought due to failed rain seasons, look on, at the Alla Futo camp for internally displaced people, in the outskirts of Mogadishu, Somalia. REUTERS/Feisal Omar)

As the FIFA World Cup in Qatar gets underway, and the newly built stadia, lavish hotels and transport networks come to life, More or Less investigates just how much the Gulf nation has spent in the lead-up to the tournament. Reports claim the figure could be as much as $220 billion - that’s more than Qatar's annual GDP, and more than ten times higher than the 2014 World Cup in Brazil. At an estimated $15 billion, this was previously the most expensive tournament to date. With no access to Qatar’s accounts, and with very few official figures in circulation, More or Less has recruited some of the world’s leading experts in sports finance to crunch the numbers and to ask…is this really a $220 billion World Cup?Presenter: Paul Connolly Producers: Paul Connolly and Jon Bithrey Editor: Simon Watts Production Coordinator: Jacqui Johnson Sound Engineer: Rod Farquhar (Image: Al Wakrah Stadium, the second FIFA World Cup Qatar 2022 (TM) venue: The 2022 Supreme Committee for Delivery and Legacy via Getty Images)

Tim Harford brings you the first episode of his new podcast, Understand the Economy. If you’ve been missing his dulcet tones, here’s a chance for you to have a preview of Tim Harford’s latest podcast, in which he offers really simple explanations to help make sense of the economy today. If you enjoy it, you can find the rest of the series on BBC Sounds or wherever you get your podcasts. In this episode, inflation. What is inflation, why does it matter, and is someone to blame if it goes up? Understanding inflation will help you understand why your shopping is getting more and more expensive and why prices rarely seem to go down. Tim Harford explains why the inflation figure you see on the TV might not reflect the price rises you’re experiencing and economic historian Victoria Bateman tells us why having a boat load of silver coins isn’t always a good thing. Everything you need to know about the economy and what it means for you. This podcast will cut through the jargon to bring you clarity and ensure you finally understand all those complicated terms and phrases you hear on the news. Inflation, GDP, Interest rates, and bonds, Tim Harford and friends explain them all. We’ll ensure you understand what’s going on today, why your shopping is getting more expensive or why your pay doesn’t cover your bills. We’ll also bring you surprising histories, from the war hungry Kings who have shaped how things are counted today to the greedy merchants flooding Spain with Silver coins. So if your eyes usually glaze over when someone says ‘cutting taxes stimulates growth’, fear no more, we’ve got you covered.Producer: Phoebe KeaneResearcher: Drew HyndmanEditor: Clare FordhamFind all the episodes here: https://www.bbc.co.uk/programmes/m001dwr7 A BBC Long Form Audio Production for BBC Radio 4

How can journalists improve their use of statistics in their reporting of the world around us? It’s a question US academics John Bailer and Rosemary Pennington tackle in their new book Statistics Behind the Headlines. They join Tim Harford to talk about how journalism can be improved by asking the right questions about numbers and using them in the wider context of a story. Presenter: Tim Harford Producer: Jon Bithrey Editor: Simon Watts Production Coordinator: Jacqui Johnson Sound Engineer: Graham Puddifoot(Image: Electronic and paper media: scanrail/Getty)

Lula Da Silva has pledged “zero deforestation” in the Amazon as he prepares to become Brazil’s next president, in contrast to the policies of outgoing leader Jair Bolsonaro under whom the destruction of the rainforest has soared. On this edition of More or Less we ask how much of the Amazon has been lost and whether Lula’s aim of zero deforestation can be achieved.Presenter and producer: Jon Bithrey Editor: Simon Watts: Sound engineer: David Crackles Production Co-ordinator: Jacqui Johnson(Image: Aerial view of the deforestation of the Amazon: Reuters/Ueslei Marcelino/File Photo)

This week, China released its third quarter GDP figure. At 3.9%, its rate of economic growth is better than many analysts expected, but still significantly short of the 5.5% target the Chinese government had set itself. There was an unprecedented delay in releasing this particular GDP stat - and that delay coincided with the 20th Chinese Communist Party congress. President Xi Jinping was reappointed for a historic third term at the twice-a-decade gathering. Some analysts found the delay suspicious. Did President Xi postpone the release of the GDP figures so it wouldn’t tarnish the congress? And can the figure of 3.9 per cent be trusted anyway? Paul Connolly investigates with the help of John Burn Murdoch, Chief Data Reporter at The Financial Times; Associate Professor of Government at Cornell, Jeremy Lee Wallace and Dr Linda Yueh, Oxford University economist and author. Presenter and Producer: Paul Connolly Editor: Simon Watts Programme Coordinator: Jacqui Johnson Sound Engineer: Neva Missirian (Image: Chinese President Xi Jinping: Mark R Cristino/EPA-EFE/REX/Shutterstock)

A US government lawyer recently caused a stir in the publishing world when he said during a high profile legal trial that half of all new trade titles – books aimed at a general audience - sell a dozen copies or less. Tim Harford investigates with the help of Kristen McLean from the NPD Books group.Presenter: Tim Harford Producers: Octavia Woodward, Jon Bithrey Editor: Emma Rippon Production Coordinator: Jacqui Johnson Sound Engineer: Graham Puddifoot (Image: Stack of books on display at the bookstore: bitterfly/Getty)

The former head of the US Federal Reserve Ben Bernanke is named as one of three winners of the 2022 Nobel Prize in Economic Sciences for his work on how banking collapses were a major factor in the Great Depression of the 1930s. He shares the prize with two fellow US academics, Douglas Diamond and Philip Dybvig. Tim Harford discusses the significance of their work focusing on the role of banks and why their smooth functioning is so important to society. Presenter: Charlotte McDonald Producer: Jon Bithrey Editor: Emma Rippon Production Coordinator: Jacqui Johnson Sound Engineer: James Beard (Image: Former Federal Reserve chairman Ben Bernanke speaks after he was named among three U.S. economists awarded the 2022 Nobel Economics Prize, during a news conference at the Brookings Institution in Washington, U.S., October 10, 2022. REUTERS/Ken Cedeno)

A cheating scandal is currently rocking the world of chess, as World Champion Magnus Carlsen accuses the young American Hans Niemann of cheating. A bombshell new report has said that Niemann is likely to have cheated in over 100 games online, and uses data to support its argument.So how is statistics being used to catch cheats in chess - and just how prevalent might cheating be at the highest levels of the game? David Edmonds finds out. Presenter: David Edmonds Producer: Nathan Gower Editor: Richard Vadon Programme Coordinator: Jacqui Johnson Sound Engineer: Graham Puddifoot(Image: US international grandmaster Hans Niemann, St. Louis, Missouri, on October 6, 2022: Photo by Tim Vizer /AFP via Getty Images)

A survey from a mental health charity suggested that more than a third of British teenagers had been prescribed antidepressants. We debunk the figure. Also we investigate a tweet from the UK Treasury about how much homebuyers will save in stamp duty. Plus how Mexico has been hit by earthquakes three times on the same day of the year - what are the chances? And how incorrect figures from the government have given a false picture of the number of cars on Britain’s minor roads. Presenter: Tim Harford Series producer: Jon Bithrey Reporters: Nathan Gower, Charlotte McDonald Production Coordinator: Jacqui Johnson Sound Engineer: James Beard

This week NASA slammed a spacecraft into an asteroid in the hope of diverting its course. The Double Asteroid Redirection Test or DART mission will help scientists understand how easy it would be protect Earth if one was headed in our direction. More Or Less first discussed this in 2016 with a little help from the movie Armageddon – with listeners getting in touch once again we ask how many asteroids are really out there and how dangerous they might be to Earth. Presenters: Charlotte McDonald and Simon Maybin Producer: Charlotte McDonald Editor: Richard Vadon Production Coordinator: Jacqui Johnson Sound Engineer: James Beard (Image: 3D rendering of a swarm of Meteorites or asteroids entering the Earth atmosphere: ratpack223/ Getty)

The value of the pound against other currencies has been incredibly volatile ever since the Chancellor’s ‘mini-budget’. We ask how much we should worry and look at how much taxes will really fall. Also did 4.1 billion people really watch the Queen’s funeral? Gas prices are falling – so why aren’t energy bills? There are early signs that new covid variants could cause another spike in cases over the winter. And with the government lifting a moratorium on fracking, we ask how seismic a number the current limit of 0.5 on the Richter scale actually is.Presenter: Tim Harford Series Producer: Jon Bithrey Reporters: Charlotte McDonald, Nathan Gower Production Coordinator: Jacqui Johnson Sound Engineer: James Beard

Ukraine has reportedly recaptured nearly 10,000 square kilometres of territory that had been occupied by Russia. We ask where the numbers come from and what they mean. Plus with Norway supplanting Russia to become Europe’s biggest supplier of natural gas, we ask how much money the country is making from the increased demand and higher prices.Presenter: Tim Harford Producer: Jon Bithrey Editor: Richard Vadon Production Coordinator: Jacqui Johnson Sound Engineer: Neil Churchill

Ukraine has reportedly recaptured nearly 10,000 square kilometres of territory that had been occupied by Russia. We ask where the numbers come from, what they mean and why everyone is comparing them to the size of Greater London. We ask how much money Norway is making out of the current energy crisis. Also why is the pound so weak against the dollar, some odd claims about women and exercise and does it really take 20,000 uses for an organic cotton bag to become more environmentally friendly than a plastic bag?Presenter: Tim Harford Series producer: Jon Bithrey Reporters: Charlotte McDonald, Nathan Gower Production Coordinator: Jacqui Johnson Editor: Richard Vadon

Is fashion really the second most polluting industry after oil and does it account for 10% of greenhouse gas emissions? Sustainable fashion journalist Alden Wicker does some fashion fact checking with Adam Fleming, presenter of BBC podcast and Radio 4 programme Antisocial. And reporter Charlotte McDonald revisits a claim made in an edition of More or Less last month about the effectiveness of using condoms as a form of contraception.Presenter: Tim Harford Producer: Jon Bithrey Editor: Richard Vadon Production Coordinator: Jacqui Johnson Sound Engineer: Rod Farquhar (Image: Models display outfits / BBC images/Susana Vera/Reuters)

One of Liz Truss's first acts as Prime Minister was to announce a giant plan to protect domestic energy users from huge rises in wholesale gas and electricity costs, meaning a typical household will pay about £1000 less than otherwise would have been the case. We ask how much the Energy Price Guarantee will cost the government and also explain what a “typical” household really is. A consultation has opened into whether we’d like more of our goods and services priced in imperial measures – but some listeners are suggesting a survey on the issue is biased against metric. And we examine a claim made on the BBC’s Springwatch programme that all of the gardens in Newcastle are bigger than the combined size of our national parks.Presenter: Tim Harford Series producer: Jon Bithrey Reporters: Nathan Gower, Charlotte McDonald Production Coordinator: Jacqui Johnson Editor: Richard Vadon

Pakistan is battling a huge natural disaster as a result of heavy monsoon rains. It’s been widely reported that a third of the country is under water. But can that really be the case? Featuring the BBC’s correspondent in Pakistan Pumza Fihlani and Dr Simon Cook, a senior lecturer in Environmental Science at the University of Dundee. Presenter: Tim Harford Producer: Jon Bithrey Editor: Richard Vadon Production Coordinator: Jacqui Johnson Sound Engineers: Graham Puddifoot & James Beard(Image: aerial photograph of flooded residential areas after heavy monsoon rains in Dera Allah Yar, Balochistan province. Credit: Getty/Fida Hussain)

Devastating floods have wreaked havoc across Pakistan after the heaviest monsoon rains in at least a decade. But is a third of the country really under water, as has been claimed? Also why do electricity prices in the UK rise in line with gas prices when we get so much of our power from other sources like nuclear, wind and solar? As criminal barristers go on strike in England and Wales, we ask if those starting in the profession really earn £12,200 a year. And as Boris Johnson waves goodbye to Downing Street, we investigate his claim that 70% of the UK now has access to gigabit broadband.Presenter: Tim Harford Series producer: Jon Bithrey Reporters: Nathan Gower, Charlotte McDonald Production Coordinator: Jacqui Johnson Editor: Richard Vadon

Daily advances in the technology of artificial intelligence may leave humans playing catch-up – but in at least one area we can still retain an edge, mathematics. However it’ll require changes in how we think about and teach maths and we may still have to leave the simple adding up to the computers. Junaid Mubeen, author of Mathematical Intelligence, tells Tim Harford what it’ll take to stay ahead of the machines.Presenter: Tim Harford Producer: Jon Bithrey Sound Engineer: Rod Farquhar Production Coordinator: Jacqui Johnson Editor: Richard Vadon(Image: Digital generated image of artificial intelligence robot scanning the data: Getty / Andriy Onufriyenko)

With energy prices in the UK spiralling, Tim Harford asks whether there is an easy and realistic way for bills to be cut. Also the number of excess deaths in the UK is rising – we’ll hear how much covid is still to blame. We return to the subject of counting in twenties, this time hearing how the Welsh language mixes traditional and decimal systems. And we debunk some spurious social media claims around Liverpool players and asthma medication.

When the official figures were announced in Kenya’s presidential election, it looked like the total percentage share of the vote for each candidate came to more than 100%. As this should not be possible, many wondered if up to 142,000 votes might be miscounted. We explore what turns out to be a simple mathematical misunderstanding of the numbers.

Videos on TikTok have been claiming that so-called “natural” birth control methods can be 99% effective. We examine what we really know, and how we know it.

The opinion polling industry’s reputation has taken a battering in recent years, as high profile slip-ups in the US presidential election exposed frailties. So should we write them off? Not according to Economist data journalist G Elliot Morris, who’s written a book called Strength in Numbers: How Polls Work and Why We Need Them.Presenter: Tim Harford Producer: Jon Bithrey Editor: Richard Vadon Programme Coordinator: Brenda Brown Sound Engineer: Rod Farquhar

Ahead of the opening of the new season of the English Premier League, baseless rumours and dodgy statistics circulating online have implied that Liverpool FC use asthma medication to enhance their players’ performance. Ben Carter speaks to sports scientist Professor John Dickinson to examine the science that disproves these rumour, and tracks down its original source with the help of Mike Wendling from the World Service's Trending programme.Presenter: Ben Carter Producer: Richard Vadon

Why do we measure the world around us in the way we do? There is a rich history to be explored - from measuring the depth of the Nile in Ancient Egypt to the central role the French played in developing the metric system and the ultra-precise measurement systems we use today. Presenter Tim Harford is joined by journalist and author James Vincent to discuss the political, social and technological factors that have influenced how we size up our world.

US athlete Devon Allen has made global headlines this week after being disqualified from the 110m hurdles final at the World Athletics Championship in Eugene, Oregon. He was judged to have left the starting blocks a thousandth of a second too early. On More or Less we crunch the numbers behind false starts in athletics, asking how quick is too quick when it comes to reacting to a starting gun and whether something else might have gone wrong with the measurement system.

In his State of the Nation address in early June 2022, Uganda’s President Yoweri Museveni said that Uganda was on the cusp of becoming a middle income country. That’s been contradicted by World Bank figures. In response to a question from a More or Less fan in Uganda, Tim Harford looks at how a country’s income status is calculated and what relevance it has. Featuring Rachel Sebudde, Senior Economist at the World Bank.

Various claims have been made about how much water is used in the production of a pair of jeans, that cornerstone of casual clothing. With growing worries over the environmental impact of denim production, More or Less decided to investigate - with the help of journalist and researcher Elizabeth L. Cline who has written extensively on sustainability and the fashion industry.

Earlier this month, the US Supreme Court overturned its 1973 ruling on Roe vs Wade - the case which guaranteed a constitutional right to a legal abortion across the US, sparking heated protests and debates across the country.But how many American women will have an abortion in their lifetime? One statistic circulating online puts it at as high as one in three. Reporter Charlotte McDonald has been looking into the figures and has uncovered some surprising statistics.

Covid cases are rising once again – how accurately are official figures picking up the new wave and how worried we should be? We discuss inflationary spirals and how much wage and pension increases contribute to inflation. Also how many parents actually struggle with childcare costs? Can long waits at A&E be put down to the pandemic and why the French count differently to the British.

After beating a plagiarism claim in court, musician Ed Sheeran said that musical coincidences were inevitable with only 12 notes to choose from… but what do the numbers say? Mathematician and concert pianist Eugenia Cheng takes us through the mathematics of music and explains how the power of exponentials mean that just a handful of notes can open up a seemingly endless world of musical variety. Presenter: Tim Harford Producer: Nathan Gower Programme Coordinator: Janet Staples Sound Engineer: Neil Churchill

Do rail workers really earn £13,000 a year more than nurses? As rail strikes severely hit services we look at some of the claims being made around pay – and explain how you can measure average pay in different ways.Plus we investigate claims that Chancellor Rishi Sunak wasted £11bn by paying too much interest on Britain’s national debt.Is pollution from tyres really 2000 times worse than pollution from exhausts?And we look at sex and statistics in America.Produced in partnership with the Open University.Credits: Presenter: Tim Harford Series Producer: Charlotte McDonald Reporters: Nathan Gower, Jon Bithrey Production Coordinator: Janet Staples Sound Engineer: James Beard Editor: Richard Vadon

Magazine articles and advice columns are commonly littered with spurious statistics about how much sex we’re having. So how much do we really know – and what are the difficulties of collecting information about such an intimate part of our lives? Doctor Marina Adshade from the Vancouver School of Economics, who specialises in the economics of sex and love, answers questions posed by a curious More or Less listener in Japan.

The former Health Secretary Jeremy Hunt says that the cost of maternity litigation claims in England is now more than the cost of salaries for maternity nurses and doctors. We crunch the numbers and ask how worried parents and taxpayers should be. Also are there more bees in the world than stars in the galaxy? And would planes be much lighter if they didn’t bother with windows? Maths Professor Hannah Fry talks to us about her experience of cancer and the choices she and others have faced after a diagnosis. And we hear from author Simon Singh, who wants to bring fun maths conversations into homes everywhere.Produced in partnership with the Open University.

British mathematics professor and broadcaster Hannah Fry has spent many years trying to explain the world through numbers. But when she was diagnosed with cervical cancer she embarked on a new mission – to discover whether the medical world, and we as individuals, make the right choices around treatment. Are patients always given the facts – and the time - they need to make rational decisions? And could we be at risk of unnecessary overtreatment?

The UK has a low unemployment rate, and a large number of people who are not working right now – we look at how both of these are true with the help of Chris Giles from the FT and Louise Murphy from the Resolution Foundation.Have pyramids really moved 4km south since they were built?For years, the media has been claiming that the odds of having identical triplets are one in 200 million – we are very suspicious. And we look at apparently concerning reports about women's life expectancy in the poorest parts of England.Plus, we have received a lot of emails from listeners about last week’s episode. Some questioning the definition of a billion, others questioning our explanation of the nautical mile. We do some reflecting.