Look before you ....
I have been musing a little recently on the subject of time travel. The reason for this musing I think I'll keep for another post. However, as a by-product of all this I have started to develop some ideas about the problems associated with time travel. I'm not talking about the mind stretching stuff much favoured by sci-fi writers who will tell you must never to travel back to meet anyone from your past who will one day have something to do with the fact that you turned up to meet them in the first place. No, nothing like that. What I've been thinking about is something far more fundamental...Imagine, if you will, that you have just put the finishing touches to your brand new time machine. You have done all the maths, the quantum mechanics and the relativity stuff. You've understood all the concepts of the space time continuum, and are very conversant with the works of the likes of Oppenheimer, Hamilton, Gauss, Schroedinger, Einstein, and not of course not forgetting Bose as every good time machine needs a semi decent speaker system.
Anyway, there stands our Will and he has before him a fully functioning time machine. He steps in, closes the door and sets the controls for... "Hmm let's see says Will, yes, ..25 years in the past, why not". He clicks his mouse on the window, types in 25 and hits the appropriate key*.
Accompanied by many weird and wonderful noises his fully functioning time machine disappears and simultaneously appears 25 years in the past. Unfortunately for him though the room in which he built his wondrous machine was on the fifth floor of the University science building which 25 years in the past was not even a sketch on an architects drawing board. Thus the fully functioning time machine now finds itself unsupported in its new location and under the influence of good old fashioned physics moves in a downward direction in a straight line until compelled to change that state by an externally applied force, i.e. the ground and whereby said machine and owner are no longer able to jointly hold the title of fully functioning.
This one simple potential problem therefore opens up a huge can of worms for any prospective time traveller. One can imagine a whole host of situations where a time machine will materialise into certain doom if one assumes that its movement through time does not involve a change of location. This implies therefore that a successful time machine needs to be a pretty good flying machine as well, to avoid all the problems associated with stuff changing at and around ground level. Saying that though, there is still a chance that it may materialise in the path of another flying object and still meet an untimely** end.
Potential tinkerers in time and space - you have been warned.
*Which begs the question - "Does a time machine's keyboard have a "Return" key?
**There are so many puns in this lot it's unreal.





