Employment puzzle, pyramids and triplets

The UK has a low unemployment rate, and a large number of people who are not working right now – we look at how both of these are true with the help of Chris Giles from the FT and Louise Murphy from the Resolution Foundation.

Have pyramids really moved 4km south since they were built?

For years, the media has been claiming that the odds of having identical triplets are one in 200 million – we are very suspicious. And we look at apparently concerning reports about women's life expectancy in the poorest parts of England.

Plus, we have received a lot of emails from listeners about last week’s episode. Some questioning the definition of a billion, others questioning our explanation of the nautical mile. We do some reflecting.

Produced in partnership with The Open University. Presenter: Tim Harford Production: Charlotte McDonald, Jon Bithrey, Lizzy McNeil, Nathan Gower Production coordinator: Brenda Brown Sound: James Beard Editor: Richard Vadon