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
WS MoreOrLess: Sleeping: the 8-hour myth
It’s often said that we should all be aiming to get eight hours of sleep a night but could it actually lead you to an early grave? Ruth Alexander reports. This programme was first broadcast on the BBC World Service.