From: ram@zedat.fu-berlin.de   
      
   Nicolaas Vroom  writes:   
   >             You can also take a train with wagons. In that case the   
   >wagons should be connected in such away that the whole train becomes a   
   >rigid object.   
      
     When a long train could be regarded as rigid, a push on one   
     side of it could transfer some information to the other side   
     with a speed that is faster than the speed of light.   
      
     Therefore, it is crucial in the realm of relativity to be   
     aware of the fact that there are no rigid objects.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)