More or Less: Behind the Stats - Where are the Paralympics Medals?

Why did the USA top the gold medals league in the Olympics, but not the Paralympics? Ruth Alexander examines the performance numbers of the London 2012 Paralympic Games and discovers which countries are punching above their weight, and which below. And Yan Wong tries to calculate how many opening bars are possible in music. This programme was first broadcast on the BBC World Service.

More or Less: Behind the Stats - How to explain infinity to a 4-year-old

?What?s the number before infinity?? asks Claudia, aged 4. We challenge Johnny Ball, legendary British TV presenter, to explain. And in celebration of the voice of Sesame Street?s Count von Count, Jerry Nelson, who?s died aged 78, there?s another chance to hear our 2009 interview with the Count, in which he revealed his favourite number: 34,969. Presented by Ruth Alexander, this programme was first broadcast on the BBC World Service.