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On 23 May, the mathematician John Nash was killed in a car crash, alongside his wife Alicia. The couple were in their 80s. Professor Nash was on his way home from Norway after receiving the prestigious Abel prize for mathematics. He also won the Nobel memorial prize in economics in 1994, and was made famous far beyond academia when he was played by Russell Crowe in the film, A Beautiful Mind. Tim...

This week: Seven Day NHS. As a commitment appears in the Queen's Speech to introduce a 'truly seven day-a-week NHS' we look at David Cameron's assertion that mortality rates are 16% higher for people admitted on a Sunday over those admitted on a Wednesday. And is seven day working really about saving lives. John Nash The mathematician and scientist, Nobel Laureate and subject of the film a beautif...

Death Row exoneration statistics. Recently it’s been claimed that for every nine people executed in the US, one person has been exonerated. Is this true – and do the statistics vary state to state?

The Police Federation says female drivers aren’t heeding the drink drive warnings. Tim Harford attempts to find out the numbers behind this. Plus: the Rotterdam Effect; Death Row exonerations; pub closures; and owl counting.

How computers are fooled by big numbers. Chris Baraniuk, technology journalist, talks about the simple software bug that has led to explosions, missing space probes, and more. Plus, an update on the two mothers-to-be whose due dates we analysed earlier on in the year.

Are stroke numbers on the rise? This was according to recent headlines. We spoke to Tony Rudd, National Clinical Director for Stroke NHS England. Plus: teachers leaving their jobs; computers being confused by big numbers; and how the UK Election would have been changed by alternate polling methods.

The birth of Princess Charlotte could contribute £1 billion to the British economy, according to some newspapers. True? Plus, the statistics of sex. This programme was first broadcast on the BBC World Service.

Tim Harford and a panel of experts discuss pre-election polls and election fact checking. Plus, is Beeston in Nottinghamshire really the most adulterous town in the country?

Why don’t all the opinion polls give the same results? Plus, would Labour’s plan to introduce a rent cap work, and how boring has this election been? The podcast features a collection of interviews from Radio 4's PM programme.

It was recently reported that the number of women training to become Catholic nuns in Great Britain has reached a 25-year high. What's the long-term trend – are more women becoming nuns? Tim Harford looks at figures from the UK and across the world. Plus, Matt Parker the stand-up mathematician is invited back to the programme to respond to a listener's query about his theory on the best way to fin...

On the eve of the UK's general election, Tim Harford takes a look at what polling data can tell us about predicting elections. Is the number of Catholic nuns on the up? What's the long-term trend – are more women becoming nuns in the UK? Tim Harford looks at the figures. Plus, Matt Parker the stand-up mathematician is invited back to the programme to respond to a listener's query about his theory...

Are migrants ‘stealing’ jobs; does South Africa have more asylum seekers than any other country in the world? These are some of the claims we explore this week in the midst of some of the worst xenophobic attacks in recent years in South Africa. Plus – could you go to jail for reporting false statistics? You might in Tanzania where they are in the process of bringing in a law to tackle publishing...

Are we witnessing a jobs ‘miracle’? Also under scrutiny - Scotland’s deficit; a mansion tax; and what would a Miliband-SNP pact cost us? The podcast features a collection of interviews from Radio 4's PM programme.

A young listener who needs a liver transplant has received an offer from his brother to act as a living donor. What are the statistics on survival? Plus, is it true that a child goes missing every 90 seconds in the USA? This programme was first broadcast on the BBC World Service.

Fact-checking the politicians during the election campaign on NHS funding; rail fares and the railways; public spending; debt and the deficit; the Right-to-Buy; and education. The podcast features a collection of interviews from Radio 4's PM programme.

Can you trust the figures given to you by the political parties during the UK's General Election campaign period? We examine and unpick the statistics so you can decide how useful they are. The podcast features a collection of interviews from Radio 4's PM programme. We look at zero hours contracts, non-dom tax status and the broader economy.

Professor Hans Rosling - perhaps best-described as a kind of international development myth buster - delivers his Ignorance Test. Hans asked presenter Ruth Alexander three questions from the test. Can you do any better? This programme was first broadcast on the BBC World Service.

Is it really true that ability in mathematics and chess are somehow linked? Tim Harford pits his wits against a math-professor-turned-professional-chess-player, John Nunn. This programme was first broadcast on the BBC World Service.

The Germanwings A320 tragedy, in which 150 people died, is the latest in a series of fatal crashes over the past year. Are more planes crashing, or does it just seem that way? Plus: is the number of penalties Chelsea Football Club have been awarded in the Premier League this season "abnormally low" as they have claimed? This programme was first broadcast on the BBC World Service.

A major 30-year study claims to show breastfed babies become more intelligent, higher earning adults. It's not the first time we've heard that breastfeeding raises IQ levels; but is this evidence any more convincing? Ruth Alexander and Hannah Moore explore the details with Dr Stuart Ritchie from The University of Edinburgh. This programme was first broadcast on the BBC World Service.

Babies born in Rwanda are likely to live healthier lives than those in the most deprived 10% of England, according to recent reports. But does the data back this up? And how is "good health" measured across the world? Hannah Moore and Wesley Stephenson explore the numbers with Professor David Gordon from Bristol University’s International Poverty Research Centre. This programme was first broadcast...

"In the next 40 years, humans will need to produce more food that they did in the previous 10,000," claimed a recent edition of The Economist. Ruth Alexander and Hannah Moore look at whether this is true. With the world's population expected to reach 9 billion by 2050, how confident can we be that everyone will have enough to eat? This programme was first broadcast on the BBC World Service.

Oscar-winner John Legend said that there are more black men "under correctional control" in the United States today than were in slavery in 1850. Is he right? Plus, how many Lego bricks, stacked one on top of the other, would it take to destroy the bottom brick? This programme was first broadcast on the BBC World Service.

It’s often said that we should all be aiming to get eight hours of sleep a night but could it actually lead you to an early grave? Ruth Alexander reports. This programme was first broadcast on the BBC World Service.

How maths can help you find love, and hold on to it. Plus, we hear a collection of our listeners’ favourite statistics. This programme was first broadcast on the BBC World Service.