Types+of+Time+Travel

__Types of Time Travel __

The rules of Time Travel The rules of time travel are all based upon people's idea's of what the rules are. There are three main rules that people have come up with for time travel. 1. History is unchangeable and is a single fixed time line In this rule it states that history cannot be changed in any way or it will result in a paradox. If this rule applies to time travel then you if you went backwards or forwards in time then you would to be able to change history in the slightest way. 2. History is flexible and is susceptible to change In this rule, history is able to be changed, but cannot be changed so much that it will create a different future. An example of this is in an episode of Doctor Who where the doctor travels to Mars and finds Captain Adeline Brooke who dies on that day on that Mars base. At first the Doctor doesn't intervene because he realizes that her death is a fixed point in time. Then later, the Doctor decides to save her and brings her back to earth to save her. But she realizes that this will alter humans' history too much so she commits suicide to keep the timeline consistent. History is changed but it still stays generally close to the original. 3. Alternate Timelines In this version, there are multiple versions of history that the time traveler can go to, slightly like parallel universes. This rule makes it so the time traveler can go to parallel universes, but going to the new timeline the original one is not destroyed. The grandfather paradox can be avoided in this rule because in the time line that the time traveler traveled to his grandfather could have died, but in his original timeline his grandfather had children which explains the time traveler's existence.

Inflexible Timelines The inflexible timeline is sometimes referred as the "Harry Potter ans the Prisoner of Azkaban" timeline. In inflexible timelines, Say you come home to find on the table a brand new bag of cheese stick and you eat all of them but you notice a small stain on the package but you disregard it. After eating all of them you go to the store and you decide to buy another bag of cheese sticks. When you get home you notice that on the package there is a small stain that looks identical to the package that you just age. So then you realize that it was yourself that gave you the cheese sticks in the past so you time travel backwards in time and leave the cheese sticks for your past self to eat. The entire timeline has no overlapping time lines so there are no paradoxes. (see paradox)

Flexible Timelines The flexible timeline is seen as the "Back to the Future timeline. In the flexible timeline history can be changed, but only slightly. Say you come home and you find a cheese stick laying on the table and you decide to eat it. Once you are done eating the cheese stick you decide to go back in time and eat it again. You go back in time to before yo came home and you eat the cheese stick that your future self was going to eat, so now you have created a paradox (see paradox) and then you get deleted from time and a new time line, where you do not eat the cheese stick, is the product of the paradox.

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