Hypothetically, imagine a starship comes across a human-inhabited, Earth-like   
   world, on which the former cities and centers of civilization have been   
   heavily nuked.  Assume it's been at least decades since the bombs fell.   
      
   My question is, what if any signs would differentiate the results of a big,   
   world-wide nuclear exchange by locals on the planet, Cold War style, from a   
   space-based bombardment carried out by outside forces?  Would there be   
   anything that would strongly    
   indicate one scenario over the other?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)