From: julio@diegidio.name   
      
   Under the rubric keep going as it's going great.   
      
   Sabine Hossenfelder, "Is time travel possible?",   
   2023-10-14 on YouTube:   
      
      
   No, PROPER TIME is *absolute*!  It *does* pass for every   
   observer/clock at the same rate, i.e. in their own frame.   
      
   (Here is the 101 on Einsteinian relativity:   
      
   Try and understand the role of proper time.)   
      
   How can an entire community of physicists (isn't it?)   
   ever get such a fundamental notion so blatantly upside   
   down is the real "mystery" here.   
      
   Julio   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)