I have more than the average number of feet!

It sounds astonishing but it's true. Because, sadly, there are some people in the world with less than two feet - they bring down the mathematical average to something like 1.9. Thus the average number of feet for a human being is 1.9. And I have 2. Which makes me more than average!

I've always been fascinated, and yet simultaneously baffled, by numbers in this way. That's why today I was chuffed to meet Michael Blastland, the journalist and broadcaster who created "More Or Less", the Radio 4 programme that cuts through the mess of lies, damn lies and statistics. By the way, the new series starts tomorrow (December 10th), in conjunction with the Open University.

Listen again to his magnificent explanation of so-called cancer clusters on the iPlayer.