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by BBC Radio 4
Tim Harford explains - and sometimes debunks - the numbers and statistics used in political debate, the news and everyday life.
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- Yesterday8 min
Are carrots becoming less nutritious?
Are fruit and vegetables less nutritious than they used to be? And is declining soil quality to blame? Loyal listener Sarah got in touch to ask us to investigate an interesting quote from Dr Karan Rajan in a BBC news story. “We know our soil is not as nutrient dense as it was decades ago,” he said. “So a carrot in the 1950s will be far more nutrient-rich than a 2026 carrot.” Is this really true? wondered Sarah. We wondered the same, so we spoke to some experts on fruit and veg nutrition to find out. CONTRIBUTORS Robin Marles, a former senior scientist in Canada’s Food and Nutrition Directorate Professor Steve McGrath, a research scientist at Rothamsted ResearchCREDITS Presenter: Tim Harford Series Producer: Tom Colls Production Co-ordinator: Maria Ogundele Sound Mix: Sue Maillot Editor: Richard Vadon
- 4 days ago28 min
Are bad teeth the number one reason kids go to A&E?
Tim Harford investigates some of the numbers in the news. This week: Are crumbling teeth the number one reason children attend A&E? We drill down into the dental health of the nation’s kids. The US Ambassador to Israel Mike Huckabee has claimed that a quarter of pharmaceuticals used in the UK come from Israel. We check the facts. Is former Education Secretary Michael Gove responsible for increasing number of young people not in education, employment or training? An AI researcher has caused a global firestorm by suggesting there’s more than a 10% chance AI kills all humans within the next decade. We explore the rigorous maths (or lack thereof) behind these kinds of predictions.Guests: Dr Chris Vernazza - head of the School of Dental Sciences at Newcastle University Daisy Christodoulou - Director of Education at No More Marketing Dr Alexandru Marcoci - Assistant Professor of Global Risk and Resilience at the University of CambridgePresenter: Tim Harford Series Producer: Tom Colls Reporter: Lizzy McNeill Producers: Nathan Gower, Phoebe Keane Editor: Richard Vadon Programme Coordinator: Maria Ogundele Sound Engineer: Neil Churchill
- 1 weeks ago8 min
Could this be the strongest El Niño in 1,000 Years?
Every year, climate scientists keep a close eye on data coming out of a particular area of the Pacific Ocean. They’re trying to measure the scale of a climate phenomenon - the El Niño event or effect. This is a naturally occurring phenomenon where ocean surface temperatures rise, transferring warmth from the ocean to the atmosphere. This can drive up global temperatures but also play havoc with weather systems, with profound consequences. And this year, scientists have watched with ever-widening eyes, as their projections for the peak of this year’ El Niño event have come in unprecedently high. Indeed, one climate scientist has argued that it's not beyond the realm of possibility to say this might be the strongest El Niño event in 500 or even 1,000 years. We wanted to find out more, so we went straight to the scientist himself. Contributor: Dr. Zeke Hausfather - research scientist with Berkeley Earth and climate research lead at StripeCredits: Presenter: Tim Harford Producer: Nathan Gower Series Producer: Tom Colls Production Co-ordinator: Maria Ogundele Sound Mix: Dave O’Neill Editor: Richard Vadon
- 1 weeks ago28 min
Why are so many ex-prisoners being sent back to prison?
Tim Harford investigates some of the numbers in the news. This week: The number of people being recalled to prison after early release in England and Wales is rising sharply. Why? Is the UK millionaire an endangered species? We ask Duncan Weldon - he’s like David Attenborough, but for economics. A viral graph seems to show that Europe is having a record low year for wildfires. How can we reconcile this with this summer’s shocking coverage of fires in France and Spain? We all know seagulls are low-life thieves - but can they really be responsible for £171m worth of robbery? Prepare for five minutes of public service journalism at its finest.Guests: Cassia Rowland, Senior Researcher at the Institute for Government Hannah Ritchie, Deputy Editor at Our World in Data Duncan Weldon, economist and author of Blood and Treasure Presenter: Tim Harford Series Producer: Tom Colls Reporter: Lizzy McNeill Producers: Nathan Gower, Phoebe Keane, Josh McMinn Editor: Richard Vadon Programme Coordinator: Brenda Brown Sound Engineer: James Beard
- 2 weeks ago8 min
Is every card shuffle unique?
Can it really be true that every shuffle of a deck of cards is unique? Mathematician and stand-up comedian Matt Parker claims that every time you do a shuffle, the cards have never been in that order before. But how can he be so confident? Matt came into the studio armed with a deck of cards and some very big calculations to back up his big assertion, and introduced us to the mind-splitting mathematical world of factorials and combinatorics. Presenter: Tim Harford Producer: Nathan Gower Series Producer: Tom Colls Editor: Richard Vadon Programme Coordinator: Brenda Brown Sound Engineer: James Beard
- 2 weeks ago6 min
Bonus podcast: Norman Numbers
What's this, an extra podcast? Has Christmas come early? No, the Bayeux Tapestry has instead returned to England for the first time in almost 1000 years.To mark the occasion, we've compiled six snack-sized stats all about the Norman invasion of England to help you have something to talk about in various social situations such a pub quizzes, movie nights and awkwardly quiet lifts. From horses to the Harrying of the North, it's all here. Presenter: Tim Harford Producers: Tom Colls, Lizzy McNeill Series Producer: Tom Colls Editor: Richard Vadon Production Coordinator: Brenda Brown Sound Mix: Sue Maillot
- 3 weeks ago8 min
Do Germans really take 19.5 days of sick leave per year?
How do different countries compare, in terms of the amount of time that workers take as sick leave?Loyal listener Dave got in touch to ask us to look at a surprising statistic he saw in the news – that the average German takes 19.5 days of sick leave per year.“This is extremely hard to believe,” he wrote.We track down the – highly reliable – source of the claim, and look at the differences between countries when it comes to taking time of work with illness.To guide us through it all is Lukas Lehner - assistant professor at the University of Edinburgh.If you’ve seen a number in the news that you think we should take a look at, get in touch: moreorless@bbc.co.ukPresenter: Lizzy McNeill Producer: Krista Beighton Series producer: Tom Colls Production co-ordinator: Brenda Brown Sound mix: James Beard Editor: Richard Vadon
- 4 weeks ago8 min
How much of the world isn’t owned by anyone?
Sometimes world events of massive practical significance lead our minds towards some lovely impractical thoughts. So it was for loyal listener, Nigel.Pondering the conflict in Iran, and the maritime ownership of the Straits of Hormuz that has become its focus, his mind wandered to an altogether bigger and - honestly - far less important question.“How much of the world surface actually doesn't belong to anyone?” he wondered.To try and answer Nigel’s question, we enlisted the help of Mark Cooper-Jones, one half of YouTube duo Map Men. If you’ve seen a number in the news that you think we should take a look at, or have a interesting statistical question like Nigel, get in touch: moreorless@bbc.co.ukPresenter: Lizzy McNeill Producer: Josh McMinn Series producer: Tom Colls Production co-ordinator: Brenda Brown Sound mix: James Beard Editor: Richard Vadon
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About More or Less
Tim Harford explains - and sometimes debunks - the numbers and statistics used in political debate, the news and everyday life.
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