From: redlionbrian@gmail.com   
      
   On Wednesday, August 21, 2013 1:21:13 PM UTC+1, Helpful person wrote:   
      
   > I've often wondered about the effect of assuming that the "constants" are   
   not truly constant.   
   Richard:   
   I have been reading Rupert Sheldrake's remarkable "The Science Delusion"   
   (Coronet 2012). One of his ten challenges is just that - what we call a   
   "constant" may be anything but. He cites variations in measurements of G and c   
   (sadly c is now *defined* as a    
   constant because of the definition of the second, but that's another story).   
   Also talks about crystallisation anomalies.   
      
   Brian   
   Ancient and Modern Optics   
      
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