Tim Harford and the More or Less team try to make sense of the statistics which surround us. From BBC Radio 4
http://www.bbc.co.uk/programmes/p02nrss1
How much heat do you lose from your head?
Every winter its the same, someone will tell you to put a hat on to save your body from losing all of its heat. But how much heat do you actually lose from your head? We take you on a journey from arctic conditions to a hot tub in Canada to explain why there might actually be more than one answer... Presenter: Tim Harford Producer: Leoni Robertson and Lizzy McNeill