| First of all there are two main time travel theories
1. Single Line time
2. Paralel Time universes
According to the first all events in our universe are predicted. All time travel and time loops have happened. And they have been biult into the main time line. According to this theory universe is a complex simulation in wich all things have been determined. For Ex. all your future time travel is already implemented into the time line. Future time travelers and the effect they have on our (or any other time) time have been "inserted".
The second one states that a time "jump" of certain person or persons, creates a paralell universe(one additional universe variation for each "time jump"). This is the idea they "tried" in Back to the future . For. Ex.
When you travel to the past. You leave your previous universe forever. All the things in that universe you left develop as if you simply dissapeared. Your past in this universe is still there but it is as if you physicaly dissapeared and the future events develop as if you will never return. And according to this theory you can't.
A new paralel universe variant is created at the time point in wich you have jumped. All previous events are kept but the "new history " of that universe is starting with you in it and you make it as you go along. Then if you jump again you leave the previous one to go to another paralel universe.
The variations between paralel universes can be as litle as just difrent posision of dust particles in the air or as big as total unexistance of species, individuals, planets ?!!?
why would someone leave his time line ... well the new time line can be altered just as much to suit the time traveler. Take a look at Back to the future part 1. Marty changed created a new one in which his father is not a wimp, his father has a great job etc. (not changing the way he will eventually meet Doc and use the time traveling "Delorian".
The main question is what happened to the world he left behind, well ... the most logical solution is that they continued their lifes without the individual that went into "time travel".
Some of the people tried to mix these two main time travel theories into one. That would be something they tried in Frequency. One time line which alters. The whole thing goes like this: Time travel creates a synch between the startin time and destination time. All the changes you make in the time that is before the other creates new changes and they happen simultaneously. Matter but even human memories change in an instant. Realy confusing. But it is difficult to synch two time lines or what would happen if 10 people went back in time. Imagine 10 time lines in synch and the changes the all simultaneously make .....
Pure chaos ..... |