27 May 2012 - 8:47 pm NZ time
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from The E=mc2 lectures on Sunday 8 May 2005
The smooth functioning of an ordered society depends in part on the possession of a technology which can measure the passage of time, and of a calendar by means of which a society can organise its activities. Associate Professor Robert Hannah, Otago University, examines the different means of time-keeping which have been developed by various societies in ancient Europe.
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