More or Less: Behind the Stats

"About one-third of American girls become pregnant as teenagers” a recent article claimed. More or Less asks if this is true and looks at the long-term pregnancy trends in developed countries. Plus: Does 55% of communication really come from body language and gestures, 38% from facial expression and only 7% from words? This programme was first broadcast on the BBC World Service.

England captain Wayne Rooney made his 100th appearance last weekend but former England star Chris Waddle claims that it’s easier to win caps now than it was in previous generations. Wesley Stephenson asks whether Waddle is right and how many caps would greats like Bobby Moore, Maradona and Pele have won if they’d played in today’s era. Plus the programme hears from Professor Carlos Vilalta from the University of California San Diego and Steven Dudley from Insight Crime about claims that “98% of homicides in Mexico are unsolved.” An amazing statistic but is it true? This programme was first broadcast on the BBC World Service.

The movie Gone Girl claims homicide is a leading cause of death for pregnant women. Ruth Alexander asks Dr Katherine Gold from the University of Michigan if this is true. And can we trust country rankings seen in the growing number of performance indices? We speak to the Economist’s international editor Helen Joyce. This programme was first broadcast on the BBC World Service.

Are airport screenings for Ebola really an effective way of stopping transmission of the disease? And as the United Nations asks for another $1bn (£625m) in aid we take a look at which governments and charities are rallying to the cause and which are not. This programme was first broadcast on the BBC World Service.

Big data has been enjoying a lot of hype, with promises it will help deliver everything from increased corporate profits to better healthcare. While the potential is certainly there, Tim Harford asks if the hype is blinding us to some basic statistical lessons learned over the past two-hundred years? This programme was first broadcast on the BBC World Service.

The coverage of the Living Planet Index and its claim that species populations have dropped 50% in the last 40 years aroused much suspicion among More Or Less listeners. The team looks at what the figure means and how it was calculated. This programme was first broadcast on the BBC World Service.

Why is Berlin the place to break the marathon world record and how long will it be before we witness someone run it in less than two hours?

Two young listeners emailed the programme to ask how we calculate the distance to the sun. We decided to invite them and their parents to More or Less towers where Andrew Pontzen, an astrophysicist at University College London was on hand to explain the answer. A BBC nature documentary stated that there are 14,000 ants to every person on earth, and that were we to weigh all of these ants they would weigh the same as all the people. Can this be true? Tim Harford and Hannah Moore investigate with the help of Francis Ratnieks, professor of apiculture at the University of Sussex.

This week Tim explains the Barnett Formula with a bit of help from Money Box's Paul Lewis. He looks at Ed Balls sleight of hand in his speech to the Labour Party Conference. Is Ed Miliband's promise on NHS funding really worse than the funding increases delivered by Margaret Thatcher? And how do we know how far away is the sun really is?

Is Britain poorer than every US state, except for Mississippi? Journalist Fraser Nelson calculates that’s the case. Tim Harford speaks to economist Chris Dillow about why he’s right. Late last year BBC Trending referred to Eritrea as ‘tiny’. Listeners complained and the complaint was upheld. More or Less talks to Trending producer Mukul Devichand and asks whether any country can rightly be called ‘tiny’.

The chance of a successful kidney match between two unrelated people has increased significantly in the past ten years - why? Tim Harford speaks to Professor Anthony Warrens, president of the British Transplantation Society. Donations to the Manchester Dogs' Home have exceeded £1m in the wake of a fire, which killed more than 50 dogs. The large sum raised caused Today presenter Justin Webb to comment that it often seems easier to raise money for animals than humans who are in need. Is it true that we give more generously to animals? Ben Carter reports. An edition of BBC Four's Wonder of Animals states that there are 14,000 ants to every person on earth, and that were we to weigh all of these ants they would weigh the same as all the people. Can this be true? And a complaint has been held up against a BBC programme for calling Eritrea 'tiny'. Can any country rightly be described this way?

It's a 'fact' beloved of English teachers around the world: that Shakespeare, the greatest playwright in English, also had the greatest vocabulary. But research published earlier this year suggests English teachers might have to look elsewhere to establish the superiority of the Bard - apparently his vocabulary lags behind the best and most famous rappers of the last decades. Is this comparison fair, and if so, does it diminish the Bard's lustre? This programme was first broadcast on the BBC World Service.

Tim Harford talks to pollsters about how they are trying to gauge the political mood in Scotland, and he analyses Nigel Farage's claim that more than half of Scotland is on benefits. Plus: celebrating Countdown, the longest-running TV quiz show; quantifying malnutrition in the UK; and does the ‘Curse of Strictly Come Dancing’ really exist?

The ALS ice bucket challenge has become a viral phenomenon. People around the world have been dousing themselves in ice-cold water and in the process have raised over $100m for charity. But a true nerd doesn't run with the herd, and Tim Harford is only going to do the challenge if the facts stack up. He investigates whether a viral challenge like this is good for charitable giving overall, and whether there are reasons to be more choosy about the charities we give to. This programme was first broadcast on the BBC World Service.

The ALS ice bucket challenge viral phenomenon has raised over $100m. Is this good for charitable giving overall, and should we be more choosy about the charities we give to? Plus: is there a 'rising tide' of anti-Semitism in Europe; does Shakespeare have the largest vocabulary, or is the Bard bested by hip hop’s finest; and is the current generation of young people likely to live shorter lives than their parents?