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Hit movies and killer birthdays
What is the highest-earning film ever if you adjust for inflation?
Weight of the world
How fat could we get? Plus, statistics to the rescue in Pacquiao-Bradley boxing row.
Chance encounters
Is the chance of bumping into your boss on holiday greater than you think?
Interview with Daniel Kahneman
Tim Harford interviews psychologist Daniel Kahneman, who won the Nobel Prize in Economics.
Counting images of Queen Elizabeth II
How many images of the Queen have ever been created?
The maths of infidelity
It's often said men are less faithful than women. Is that mathematically possible?
Hardest-working nations
Greeks may put in more hours than Germans, but who works the longest hours in the world?
Trouble on the Greek railways
Is Greek rail so inefficient it would be cheaper to send every passenger by taxi?
A grand economic experiment?
European austerity versus US stimulus.
The formula that changed the world
The Midas Formula. The story of Black-Scholes - the equation that transformed Wall Street.