🚀 go-pugleaf

Lawrence Lam wrote:
> 
> If time travelling is possible, we can assume that man kind will in one
> day be able to do that.  Then why don't we see visitors from the future?
> Would the world (in the past, present and future) become homogenous once
> people could travel through time?  Just think about how ships and
> planes have made this world more and more homogenous.

You've been reading the Hitchhiker's Guide to the Galaxy again, haven't
you?  ;)

The assumption one has to make in this case, if one wishes to remain
sane, is that any theoretical time travel from the future to the past
has already taken place in the past.  If, in 2010, you go back in time
to right now and assassinate somebody, that event will take place right
now and it will be in the papers.  Imagine several decades from now,
when we finally discover that JFK's assassin was a time traveller from
the "future".  ;)

This is one theory of time travel.  Other theories state that any
disruption in time causes a "split" in the dimension of probability,
generating two or more separate universes, one for each outcome of the
event.  According to this theory, there are an infinite number of
universes, each different from its neighbors by a single event somewhere
in the course of time.  If you were to go back in time, you would create
a split in the flow of time:  one universe where you did go back, and
one where you didn't.

This all, of course, is based on the supposition that time travel in
reverse is really possible, which is yet to be proven.  :)

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