I listened to this in the night - it traces the history of telling the time from sundials to optical clocks, with watches in there too!

Obviously as it is only 41 mins long it is not that detailed but I found it enjoyable enough with some new - to me - insights.

This is the blurb "Many of us can find the time of day quickly and accurately but where did the idea of time keeping originate and how did our ancestors manage without the instant access we take for granted today?"


http://www.bbc.co.uk/programmes/p053g7vr