What has the colour of your hair got to do with your capacity to withstand pain?

We investigate the claim, which regularly circulates on social media, that natural redheads are 25% tougher than their brunette peers.

Pain expert Jeff Mogil explains how it all comes down to something called MC1R.

Presenter: Charlotte McDonald Producer: Lizzy McNeill Series Producer: Tom Colls Editor: Richard Vadon Production Co-ordinator: Katie Morrison

The claim that 79% of asylum seekers in Sweden go on holiday in their home country has been repeated regularly on social media. It’s used to argue that recent refugees are being disingenuous about the danger they face in the country they have fled from. But when you look at the survey the claim is based on, you see the stat in a very different way. We speak to Hjalmar Strid, who ran the survey for polling company Novus, and Tino Sanandaji from Bulletin, the online news site which published it.

Presenter: Charlotte McDonald Producer: Tom Colls Production co-ordinator: Katie Morrison Sound Mix: Neil Churchill Editor: Richard Vadon

We asked and you responded, this edition of ‘numbers of the year’ are from you. our loyal listeners. We scoured the inboxes to find three fascinating numbers that say something about the world we live in now and put them to our experts. Tune if you want to hear about rising global temperatures, what Taylor Swift has in common with 65 years olds and facts about fax (machines).

Contributors: Amanda Maycock, University of Leeds Jennifer Dowd, University of Oxford

Presenter: Charlotte McDonald Reporter: Lizzy McNeill Producer: Vicky Baker and Lizzy McNeill Series Producer: Tom Colls Editor: Richard Vadon Sound Engineer: Rod Farquhar.

It’s that time of year again, the time when we ask some of our favourite statistically-inclined people for their numbers of the year. We present them to you - from falling birth rates in India to children saved by vaccines.

Contributors: RukminiS, Data for India Professor Sir David Spiegelhalter, Cambridge University, Hannah Ritchie, Our World in Data.

Presenter: Charlotte McDonald Producers: Lizzy McNeill and Vicky Baker Series Producer: Tom Colls Editor: Richard Vadon Sound Engineer: Donald McDonald and Rod Farquhar

“Say what you like about Mussolini but he did make the trains run on time.” This phrase is the political equivalent of “every cloud has a silver lining” – but does it have any factual basis? Mussolini’s dictatorship in Italy was full of atrocities, brutal suppression and propaganda. Did it also create a more efficient railway network? We speak to Professor Ruth Ben-Ghiat about the truth of the claim and why the Mussolini regime wanted us to believe it. Presenter: Lizzy McNeill Producer: Lizzy McNeill Researcher: Esme Winterbotham Series Producer: Tom Colls Editor: Richard Vadon Sound Master: James Beard Production Co-ordinator: Katie Morrison.

Image: Benito Mussolini in his train studying maps. (Photo by ullstein picture/ullstein picture via Getty Images)

Are most Americans barely holding their head above water when it comes to personal finances? That’s what various US politicians and news outlets keep suggesting. They can’t stop using a statistic about people living “paycheck to paycheck”. But what does this really mean?

We go behind the headlines to unpick the numbers. Contributor: Ben Krauss, journalist Presenter: Charlotte McDonald Producer: Vicky Baker and Lizzy McNeill Series Producer: Tom Colls Production co-ordinator: Katie Morrison Sound Engineer: Andrew Mills Editor: Richard Vadon

When World War Two came to Greece, a period of terrible human suffering followed. There was a brutal battle with Italian and then Nazi forces, followed by an occupation in which thousands were executed and a terrible famine swept the nation.

There’s an often repeated number that appears to capture the brutality of this time – that 10% of the Greek population died during the war.

We investigate where this statistic comes from and whether it is true.

Presenter: Charlotte McDonald Producer: Tom Colls Production co-ordinator: Katie Morrison Sound mix: Neil Churchill Editor: Richard Vadon

President Elect Donald Trump has created a new government advisory group – the Department of Government Efficiency or ‘DOGE’ - to help cut the US budget.

The world richest man, Elon Musk, will co-head the department and has pledged to cut ‘at least $2 trillion’ to ‘balance the budget’. But is this possible? We talk to Professor Linda Bilmes about what DOGE could or couldn’t do and how she balanced the budget in the 1990’s.

Presenter: Charlotte McDonald Producer: Lizzy McNeill Series producer: Tom Colls Production co-ordinator: Katie Morrison Sound Mix: Andrew Mills Editor: Richard Vadon

Governments around the world have promised to fight climate change. But are they also pumping an absolutely massive amount of money into subsidies for fossil fuels? In 2022, an IMF working paper estimated that global subsidies for fossil fuels totalled $7 trillion. But when you dig into that research, you find that this number might not mean what you think it does. We explain how they reached that conclusion, with the help of Angela Picciariello from the International Institute for Sustainable Development, and Nate Vernon, one of the co-authors of the IMF paper.

Just hours after Donald Trump claimed victory in the US presidential election, rumours started swirling that something was afoot. A graph went viral on social media that appeared to show there were 20 million more votes cast in 2020 than in the 2024 election. Where had these supposedly “missing” votes gone? Conspiracy theorists on both sides of the political spectrum began shouting claims of fraud. The answer, it turns out, is rather more straightforward. Presenter: Charlotte McDonald Producer: Lizzy McNeill Series producer: Tom Colls Production co-ordinator: Katie Morrison Sound Mix: Hal Haines Editor: Richard Vadon

A huge quantity of clothing is produced every year around the world. But is so much made that there are already enough tops, trousers, skirts and all the rest to clothe humanity for decades into the future?

That’s a claim that has been percolating around the internet recently, that there are already enough clothes for the next six generations.

Tim Harford and Beth Ashmead Latham explore the source of this claim and, with help from Sabina Lawreniuk from Nottingham University, find that the evidence behind it is far from persuasive.

Presenter: Tim Harford and Bethan Ashmead Latham Producer: Bethan Ashmead Latham Series producer: Tom Colls Production co-ordinator: Katie Morrison Sound Mix: Annie Gardiner Editor: Richard Vadon