From: SolomonW@citi.com   
      
   On Wed, 19 Sep 2018 15:34:24 +1200, Eric Stevens wrote:   
      
   > On 18 Sep 2018 20:16:18 GMT, reader wrote:   
   >   
   >>   
   >>https://www.eurekalert.org/pub_releases/2018-09/uocf-iss091818.php   
   >   
   >   "The researchers found that societies often experienced booms and   
   >     busts simultaneously, a process known as synchrony."   
   >   
   > That does not mean that the societies were directly connected. It mans   
   > that they were subject to an external influence (e.g. climate) at the   
   > same time.   
   >   
   > Otherwise, largely a study of the obvious.   
      
   I was thinking exactly the same.   
      
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