[time-nuts] NPR story on coupled pendulums

[Hal Murray]

University Of Lisbon Scientists Solve Pendulum Clock Mystery

Two professors at the University of Lisbon say they have discovered why the 
pendulums of clocks set on the same surface will eventually swing together in 
opposing directions.

http://www.npr.org/2015/07/28/427178282/university-of-lisbon-scientists-solve-
pendulum-clock-mystery

I thought the NPR story was not very interesting.  (But it probably wasn't 
targeted at time-nuts. :)

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Here is the paper:
  Huygens synchronization of two clocks
  http://www.nature.com/srep/2015/150723/srep11548/full/srep11548.html


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