More or Less: Behind the Stats

• Could you be hit by a falling satellite?

  The number of satellites orbiting our planet has been rapidly increasing in recent years. But what are the risks when they start falling back down to earth?The European Space agency estimate that by 2030 there will be 100,000 satellites in orbit. We look at whether that estimate is realistic and what it means for those of us living on the ground below, with the help of Jonathan McDowell and Fionagh Thomson. Presenter: Tim Harford Producer: Lizzy McNeill Series Producer: Tom Colls Production co-ordinator: Brenda Brown Editor: Richard Vadon Studio Manager: James Beard

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• How do you make something 10-times more lethal?

  What does the government mean when it commits to developing a “10-times more lethal” army? Why was the much-missed Sycamore Gap tree said to be worth a strikingly exact £622,191? Are there really twice as many people teaching Yoga as there are in the fishing industry? Is the number of workers per pensioner really falling from 4 to 3 to 2? And what did Donald Trump mean when he said the price of eggs had fallen by 400%?Tim Harford investigates some of the numbers in the news. If you want us to look at a number you think looks a bit suspicious, email the team - [email protected] note an earlier edition of the programme incorrectly stated that the new EU-UK fishing agreement would last 4 years. The agreement length is 12 years. More or Less is produced in partnership with the Open University. Presenter: Tim Harford Reporter: Lizzy McNeill Producer: Nicholas Barrett Series producer: Tom Colls Production co-ordinator: Brenda Brown Sound mix: Neil Churchill Editor: Richard Vadon

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• Is the world’s population being miscounted?

  Exactly how many people live on our planet is one of those difficult-to-answer questions. The UN estimates is 8.2 billion, but that’s largely based on census data, which is certainly not a perfect measure. So when a recent study from Finland found that rural populations around the world had been underestimated by 50 to over 80%, the media got quite excited. This would be a big error - a 50% underestimate would mean the actual number of people in an area is double the number they thought there were. One newspaper in Spain - El Mundo - did its own sums and said this meant there were potentially 2 billion more people in the world than we currently think there are. But is it what the researchers in Finland actually meant? “Absolutely not,” says Josias Lang-Ritter, a researcher from University in Finland and a co-author of the study.Tim Harford speaks to Josias to figure out the right way of understanding the study.Presenter: Tim Harford Producer: Caroline Bayley Series producer: Tom Colls Production co-ordinator: Brenda Brown Sound mix: Nigel Appleton Editor: Richard Vadon

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• Does the average American have fewer than three friends?

  Tim Harford is here to sprinkle a refreshing shower of statistical insight over the parched lawns of misinformation.This week, we try to unpick the confusion over a claim made by London Mayor Sadiq Khan about the contribution skilled immigrants make to the nation’s finances.Mark Zuckerberg says that the average American has fewer than 3 friends. Is he right?Two doctors claim that up to 90% of Alzheimer’s disease can be prevented. Are they wrong?And Tim interviews an American, Catholic, philosopher of religion called Robert Prevost. Is he the pope?If you’ve seen a number in the news you think we should look at, email the team – [email protected] or Less is produced in partnership with the Open University.Presenter: Tim Harford Reporter: Lizzy McNeill Producers: Nicholas Barrett and Nathan Gower Series producer: Tom Colls Production co-ordinator: Brenda Brown Sound mix: Nigel Appleton Editor: Richard Vadon

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• Factchecking the Trump administration’s Autism claims

  Picking Robert F. Kennedy Jr., a known vaccine sceptic, as the Secretary for Public Health might not be the most ‘out there’ thing the Trump administration has done but it certainly raised some eyebrows. Since his appointment Kennedy has been on a mission to ‘Make America Healthy again’ and has set his sights on finding ‘the cure’ for Autism. Autism Spectrum Disorder is a neurological and developmental disorder that can affect how someone communicates, socialises, learns and behaves. In the 1980’s one study estimated that 4 in 10,000 (1 in 2500) children in Wisconsin had an Autism diagnosis. Recent data from the Centres for Disease control states that 1 in 31 eight year olds in the US have the condition. Why have the numbers gone up? Is it due to environmental toxins as Robert Kennedy suggests or does the answer lie in the counting? Presenter/Producer: Lizzy McNeill Series Producer: Tom Colls Production Co-ordinator: Brenda Brown Studio Manager: Andrew Mills Editor: Richard Vadon

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