Time Travel – Is it really possible?
For a many years time travel was solely in the realms of fantasy writers. Now it is very much in the mainstream of scientific thought, and many experts agree that theoretically speaking time travel is definitely possible.
Major breakthroughs in our idea of time came with Einstein’s Theory of Relativity. Yet ground breaking though this theory was there are still sizeable restraints.
One is that the speed of light cannot be broken, because if it were this would lead to infinite mass and time would just stand still. The other constraint is that while forward travel in time is possible it would be out of the question to travel back to other ages.
Of course science does not like restraints and more recent theories hold that brilliant though Einstein’s theories were they are not so solid as was first supposed. Now there is the feeling that forward, as well as backward time travel will one day be possible.
Defining time is no easy business. We perceive events as having a past or a present but even defining the present is a difficult business. For instance whatever moment you define as the present quickly becomes the past and we see that time is extremely fluid. As for the future – that’s something we never seem to reach and it could be said with some authority that the present – whatever that is – is the only reality we will ever know.
When it comes to time travel it is important that our perception of time should be modified. We nearly always think of time as linear, yet modern experts believe that time may really be circular. In other words we could travel so far into the future that eventually we would come back to the year of our birth.
One of the arguments against backward time travel is that we could go back and alter details of the past that would render ourselves and maybe even the world itself nonexistent. The much quoted example is of traveling back and killing your grandmother, thereby eliminating the steps that led to ones birth. In this theory one would literally cease to exist. But if so then how could one travel back to stop being born in the first place if one did not exist??
Perhaps one answer to this enigma is to think of time as neither just linear or circular but a combination of both. For instance the Earth travels around the Sun once a year whereupon the seasons repeat themselves, but events do not. Perhaps then super time is just a more complex example of going around and forward at the same time, part of both a loop and forward travel. In this system events could be added to even if they appeared to conflict with what had already happened.
The above mentioned circumstances highlight just some of the many conundrums involved in …