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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

Are African leaders more likely to die in office?

Are African leaders more likely than their counterparts elsewhere to die in office?

• 10 mins

How to explain infinity to a four-year-old

Can Johnny Ball explain infinity to a 4-year-old? Plus, an interview with Count von Count.

• 10 mins

Where are all the US Paralympics gold medals?

Why did the USA top the gold medals league in the Olympics, but not the Paralympics?

• 10 mins

Investigating crime statistics

Investigating Sweden's high rape rate; and which surprising countries top kidnap league?

• 10 mins

Factchecking America

We ask - who fact-checks the fact-checkers?

• 10 mins

Plenty more fish in the sea?

Newspaper headlines claim "Just 100 cod left in the North Sea". Can that be right?

• 10 mins

Predicting the Presidency

This week Nate Silver tells us who he thinks will win the 2012 Presidential race.

• 10 mins

Predicting the global population

Predicting the global population

• 10 mins

Life-saving Economics

How Nobel prize-winning economists Alvin Roth and Lloyd Shapley are helping save lives.

• 10 mins

Predicting L'Aquila Earthquake: is it right to blame the scientists?

On More or Less this week we look at how the probability of an earthquake is estimated.

• 10 mins