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Which is the world's biggest city?

Tim Harford asks which is the world's biggest city - not as simple a query as it seems.

• 9 mins

More alive than dead?

Are more people are alive than dead and did Michelle Obama spend $50,000 on lingerie?

• 9 mins

Measuring Famine and Slaying a Sporting Myth

How do you measure a famine? Plus, Tim Harford slays a sporting myth.

• 9 mins

Cybermetrics and Groundhog Day

Tim Harford investigates internet search engine accuracy, and groundhog weather forecasts.

• 10 mins

Polling opinion in Syria, and Europe's work hours

Tim Harford casts doubt on a Syrian statistic. And, which European nation works the most?

• 10 mins

Living on less than a dollar a day

Tim Harford examines the dollar-a-day poverty line. How useful a measure is it?

• 10 mins

Why Apple isn't worth more than Poland

Tim Harford debunks reports that Apple is bigger than Poland, and probes safe water goal.

• 10 mins

Red meat death risk?

Tim Harford assesses the dangers of red meat. And he ranks the world's largest employers.

• 10 mins

What is the world's average salary?

Tim Harford explores income equality, and ranks the world's top militaries.

• 10 mins

Do big football clubs win more penalties?

Tim Harford looks at referee bias, and he gazes into the future with Hans Rosling's data.

• 10 mins

Stamp prices and the first maths book

Tim Harford compares post costs around the world, and finds out how modern maths took off.

• 10 mins

Eurostats - true or false?

Are there more Porsche Cayenne owners in Greece than those earning more than 50K euros?

• 10 mins

Measuring species loss

Are we experiencing the greatest wave of extinction since dinosaurs?

• 10 mins

The formula that changed the world

The Midas Formula. The story of Black-Scholes - the equation that transformed Wall Street.

• 10 mins

A grand economic experiment?

European austerity versus US stimulus.

• 10 mins

Trouble on the Greek railways

Is Greek rail so inefficient it would be cheaper to send every passenger by taxi?

• 10 mins

Hardest-working nations

Greeks may put in more hours than Germans, but who works the longest hours in the world?

• 10 mins

The maths of infidelity

It's often said men are less faithful than women. Is that mathematically possible?

• 10 mins

Counting images of Queen Elizabeth II

How many images of the Queen have ever been created?

• 10 mins

Interview with Daniel Kahneman

Tim Harford interviews psychologist Daniel Kahneman, who won the Nobel Prize in Economics.

• 10 mins

Chance encounters

Is the chance of bumping into your boss on holiday greater than you think?

• 10 mins

Weight of the world

How fat could we get? Plus, statistics to the rescue in Pacquiao-Bradley boxing row.

• 10 mins

Hit movies and killer birthdays

What is the highest-earning film ever if you adjust for inflation?

• 10 mins

Drinks and drugs capital of the world?

Do residents of the tiny micronesian island of Palau really smoke more cannabis?

• 10 mins

Who are the Libor losers?

How much damage did messing with Libor actually do to the financial system?

• 10 mins

The Tour de France and the statistics of cheating

Can maths prove whether the Tour de France has clamped down on the use of banned drugs?

• 10 mins

Gun laws and gold medals

Would tighter gun laws lead to fewer gun deaths? Also: how Olympians have changed.

• 10 mins

How extraordinary is Ye Shiwen?

How extraordinary was Ye Shiwen's Olympic performance? More or Less looks at the numbers.

• 10 mins

How to lose money - fast

Is the rapid growth of high frequency trading progress or a threat to the financial system

• 10 mins

Levelling the statistical playing field

Which countries over and under achieved at London 2012?

• 10 mins