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Temporal paradox – paradoxical situation arising from time travel in the other side, when as a result of some actions in the past such a journey cannot be undertaken. Typical example is the grandfather paradox when a hero traveling to the past, kills his grandfather before he manages to conceive his father. it is a paradox because, killing a grandfather, a hero prevents own birth and thus prevents time travel preventing his birth. Various philosophical schools have a different view of how grandfather’s paradox to be decided if the time machine is still invented. Hypothesis of protection of time sequence The essence of this the hypothesis is that the time traveler simply cannot create a paradox because the natural passage of time will not allow him this. For example, it will appear in the wrong place and nothing at all can’t do it, or he will be prevented by various twists of fate, or even he, without noticing it, will restore the course of events in the form in which remembers them. This, by the way, creates another paradox – the paradox of predestination, it is also a temporary loop, when time traveler is destined to go on a trip in time and there to carry out some actions that are already have occurred. Usually these actions determine the need traveling in the future, an example is a phone call to myself. A similar theory claims that time travel responsible for what the world is today, that is, actions travelers in the past affect the present. On the other hand in In this case, travelers will try to interact with the past as little as possible for fear of the consequences. In Game Fallout 2 Favorite using a temporary portal can get into Vault 13 and accidentally breaking a water chip, breaking it will cause to leave the Vault of his ancestor, the Vault Dweller, so that subsequently to be expelled and found the village in which the Chosen One will be born. By the way, the hero may not go to this portal and even for the whole game never see him, but events have already occurred, which makes fans to guess the true cause of the breakdown. Such a course of history can easy enough to imagine. Imagine that time is book. The time machine allows you to turn several pages, but the text in them will not change from this, nor written about others, nor written about you. Temporary damage hypothesis sequences This hypothesis suggests that any the time traveler’s actions strongly influence the future and cause the so-called “butterfly effect”, that is, even a slight change in the past leads to a complete change in the whole stories in the future, such as in the film “Butterfly Effect” or Ray Bradbury’s short story “And Thunder struck” when during a safari Jurassic one of the participants steps on a butterfly in the United States the wrong president is elected. A very popular illustration of this An example is the movie “Back to the Future,” where Marty is a schoolboy McFly travels in a time machine created by Doc Brown and first tries to save Doc from death, and then restore “natural” course of history to get back into the familiar world. 
Photos from open sources In addition, this hypothesis is the basis many works with the so-called “alternative history”. For example, in the series of games “Command & Conquer: Red Alert” (Red threat) the action takes place in a world in which, after World War II War Einstein created a time machine, returned to the past and killed Adolf Hitler. As a result, in the 50s of the USSR under the leadership of Stalin invades Europe and unleashes a world war. In world of Warcraft Bronze Dragons, overlords of the times, sometimes ask player to restore the natural course of history, arguing that if not to do this, the consequences will be much worse. Thus, players manage to take part in events that took place in Azeroth’s past, which they saw in previous games from Blizzard: the opening of the Dark Portal between worlds by the magician Medivh, the battle for the mountain Hyjal, Thrall’s Escape, Purification of Stratholme by Prince Arthas Menethyl. Multiple Universe Hypothesis the hypothesis is that there are an infinite number of universes, according to one for every choice. So if time traveler would kill grandfather then there will be a universe with grandfather alive and dead grandfather. Another hypothesis is that killing grandfather creates a new universe in which happened murder, but it doesn’t affect either the killer or his original the universe. For example, in one of the comics, Superman tries prevent many historical events, such as murder Lincoln. However, returning in due time, he finds no differences, but later discovers a neighboring universe with an alternative a story that emerged as a result of his actions. Hypothesis about merging universes as opposed to the hypothesis of multiplicity universes, this hypothesis suggests that any action, perfect when traveling in time, rewrites the past. So way if a time traveler meets his take from of the past, then he simply merges with him, becoming part of the time, in which is the action. The same is true for events: two events will merge into one that does not generate a paradox. That is, death grandfather in one universe and his life in another merge so that the hero’s past allowed him to continue to exist, either if it impossible to destroy all of his traces from the future. 
Photo from open sources The hypothesis of the choice of time consistency The idea is that the story changes immediately as only a time traveler will think about time travel. In this way, he can send messages from the past to the future and receive the tools or materials he needs at the moment with using another journey into the earlier past. It was described by Harry Harrison in Steel Rat books and in the film “The Incredible Adventures of Bill and Ted.” “It can’t be because it can never be! “This hypothesis claims that time traveler is past in relation to future to myself. If in the future one day a time machine is created, then, probably she will ever be replicated and someday potential future time traveler will reach her and send to his past. But since this does not happen, time machines were not invented and cannot be invented. Also there is a point of view that the time machine may self-destruct, if you send it to the past before the date of its invention. Hypothesis about loss of motive The bottom line is that if the traveler built a time machine in order to fix something specific and reached this time travel goals then the reason for creating a machine time will be eliminated and thus the machine will not be created, but another paradox will be created, essentially similar to the paradox grandfathers. On the other hand, this paradox can be circumvented if no manipulation of time can change an event that time traveler needs to change. Then a time machine it will still be built, whatever the traveler does during travel to the past. Harmonious universe. That’s all. simple enough: the universe strives for harmony and therefore will correct itself back, even if a certain person, event or the idea threatens to destroy this harmony. An example of this in the Soviet literature is the work of the Strugatsky Brothers “For a billion years to the end of the world “with the concept of” homeostatic universe. ” Empty time The theory of time travel, approximately described by Stephen King in Langoliers and more in detail – Clifford Simakom in the story “What could be easier time. “Once in the future or past, the traveler will find that it is empty. No people, matches and gas do not burn, food and the drinks are tasteless, no electricity, weather and time of day either are static, or change anyhow (just put, there are only those objects that are deeply rooted in time and almost eternal – for example, our planet is under our feet; all other items exist only in the form of their shadows or ghosts). 
Photos from open sources The past disappears after some time, there is no distant future, but if you hit the nearest hero, it remains just wait for it to catch up with the present (or, as an option, the future in fact not, but anyone who gets there will be faced with a complete emptiness in which there is not even air). At that moment, suddenly for the hero will appear around (and he will appear suddenly for others, what could be fraught with nothing at best, a little less than the best collision, and at worst depends on the imagination of the author), matches at ticking about boxes will burn, etc. Substitution Hypothesis memory The essence of this hypothesis is that a person, changing the past, changes himself, and therefore will not remember anything. For example, if a certain person returns to the past and kills Stalin, then Hitler will win the war and conquer the world. But in this case it turns out that this certain person was born in a fascist society, lived, talking in German and watching everywhere where it is possible and where it is impossible to swastika. So when he returns to the future, it will seem to him that nothing has not changed (because he changed the past and never lived in our society), although in reality everything has changed, because Hitler did won the war. A similar example can be seen in the film “Effect Butterflies “, with the difference that the GG film is aware and remembers everything “alternative branches of development” of time.
War Time Universe Time Machine Portals Stalin
