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Most people believe that time travel is impossible - although a few centuries
ago most people thought the world was flat and anyone going too close to
the edge would fall off. Just because a thing seems beyond all possibility
now, does not necessarily mean it always will be.
Probably the first step in accepting the prospect of time travel is to realise
That WE ARE ALL TIME TRAVELLERS - travelling through time at the same
speed; minute by minute, hour by hour, day by day and so-on. However, we
are also all going in the same direction: onwards to the future. Visiting the
past seems impossible ... unless you happen to have a time machine.
In theory, certain things would be needed to make a time machine work. A
minuscule Planck-sized wormhole would have to be located in the space-time
foam and then inflated to a traversable size with an influx of anti-gravitational
exotic matter. Next, a huge burst of negative energy would be vital. Something
that utilized the Casimir Effect (rapidly oscillating mirrors) might work - but a
perpetual loop or vortex of lasers would probably be more efficient. The
wormhole would need to be stabilized, and a way found to determine the
traveller’s destination, preferably in Minkowski space-time co-ordinates,
(three dimensions of space and a fourth dimension of time).
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