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The Trouble With Time Travel

From: UFO UpDates - Toronto <post.nul>
Date: Tue, 13 Dec 2011 17:59:55 -0500
Archived: Tue, 13 Dec 2011 17:59:55 -0500
Subject: The Trouble With Time Travel

Source: NewScientist.Com


12 December 2011

The Trouble With Time Travel

Physics indicates it may be possible to go back to the future,
and in How to Build a Time Machine, Brian Clegg argues that it's
never too early to prepare

AT 10 pm on Saturday 7 May 2005, some 400 people waited at the
Massachusetts Institute of Technology for some very special
guests to arrive. Time travellers from any and every point in
the future had been invited to join the party in Cambridge. "The
idea was a simple one that might at first seem trivial but was,
in fact rather clever," Brian Clegg explains in How to Build a
Time Machine. "If time travel is possible, why not flag up a
certain place and time in history and invite time travellers to

The organisers had tried to ensure that the relevant information
seeped into the future, and hoped a combination of internet,
print media and TV coverage would do the job. How could any
curious, party-loving time traveller resist?

The no-show raises a simple question about the possibility of
travelling back in time. We may not yet have the technology to
move freely through the ages, but if time machines are going to
be built at some point in the future, why hasn't anyone come
back to visit us? According to the theory of special relativity,
as one moves faster and faster and approaches the speed of
light, time slows down. At the speed of light, time stands
still. If one could go faster than light, then in principle it
is possible to travel back in time. So, Clegg asks, "Where are
the time travellers?"

[More at site... thanks to 'The Norm' for the lead]

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