X-Message-Number: 27295
From: 
Date: Sat, 29 Oct 2005 11:18:37 EDT
Subject: Time

It is easy to show that travel into your own past is logically impossible,  

hence presumably physically impossible as well. But just about everything else
about time is simply mysterious. (Space too, for that matter.)
 
According to the current dominant interpretation of quantum theory, the  
present is ambiguous, hence also the past and future. Some big brains think  

actions in the present can change the past. Others think there is more than one
dimension of time, as well as many extra dimensions of space. 
 
On the world stage, the fat lady isn't even warming up.
 
Robert Ettinger


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