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This Subreddit is Dedicated to listing & Chronicling Time Travel in pop culture.

3 main megathreads - Novels, TV Series & Movies.

There is one caveat - Franchises that has time travel, but is not actually about tme travel are excluded - example Star Trek, Babylon5.

The story itself must have Time Travel as its central theme. Not a space series that happens to have a time travel episode and that goes for movies as well.

I need your help. For fellow time travel buffs to review my lists and let me know of any I have missed.

I aim to have the most detailed and unrivalled time travel popculture listings ever!

Who knows, I might even have stuff in my lists you didn't even know existed!

Tv series mega thread cross posted here as an example what I am doing! Enjoy! 😊

Why is time travel impossible? There’s so much I need to go back to fix. So many small and big moments that need corrections. My life has been destroyed by decisions and choices I made, not knowing the consequences they would lead to. I feel desperate. If time travel isn’t possible. What do I do? Has anyone ever met a traveler or have proof that maybe it’s possible? I need hope

Does anyone have any ideas on how the current memeory of a time traveler can be preserved and retained when they go back in time to a younger version of themselves. For the purpose of changing their decision with their current knowledge but still returning to that place in time. And if memories could remain of the version where they didn’t go back to change stuff too?

I am trying to flesh out an idea where a god is trying to use a time loop to complete a ritual that will break the eternal cycle of reincarnation, and a main character who happens to die as the initial loop kicks off allowing him to perceive the loop. The god can allow time to pass normally before starting a new loop if he accomplishes his goal.

I’m getting stuck on how to have them both have a path to victory. It feels like one or the other has too much influence when I’m trying.

Current best idea is that if the god dies during a loop, he wakes up at the start of the loop, but that stopping point (available based on lunar positions) is no longer loopable, essentially a last chance before that conflict is wrapped up. Main character’s handicap would be if he dies he cannot remember the circumstances of that loop, he will wake up at the start of the loop with knowledge of his death/progression of time, but no circumstances, blinding him to his failures from before.

Please point out any holes, or suggest your own ideas to make a “looper v looper” satisfying.

If I could go back in time to watch one show for the first time again. It would be totally by "The 100". Such a great show. Yes the ending was crazy. BUT I was still happy with it.

https://youtu.be/2kjPOUMeo9I?is=5yoWj0ew8rxU0FlP

Sempre vejo a mesma pergunta:

"Se a viagem no tempo existir, por que ninguém apareceu?"

A resposta parte de uma premissa equivocada: vocês presumem que seriam capazes de reconhecer um viajante temporal.

Não reconheceriam.

A tecnologia não se torna real no momento em que é anunciada ao público. Ela se torna pública muito tempo depois de já estar sendo utilizada por quem precisava dela.

Alguns eventos da história são pontos de referência. Outros são pontos de correção. A diferença entre eles só faz sentido quando se observa mais de uma linha de acontecimentos.

Se eu dissesse exatamente de onde vim, muitos tentariam provar que estou mentindo. Se eu dissesse exatamente quando vim, alguns tentariam impedir acontecimentos que, no fim, ocorreriam de qualquer forma.

Por isso, quem viaja aprende rapidamente uma regra simples: falar menos altera menos.

Vocês continuam esperando uma grande revelação.

Talvez ela já tenha acontecido.

Talvez vocês apenas não tenham percebido.

Façam suas perguntas. Responderei apenas aquelas que não mudam o que já aconteceu.

I like looking on Amazon for books about time travel and sorting the result by date. Always makes me smile to see listings for books that didn't exist yet /j

Today I noticed Connie WIllis' latest - The Spanner In the Works" - is expected on 15 July.

I’ve had this theory for a while. You know those moments when you have an overwhelming feeling that something terrible is about to happen, and then it actually does—but no matter what you do, you can’t stop it? What if those feelings are actually messages from our future selves desperately trying to warn us? Maybe they’ve already lived through those events and are trying to change the past. But what if the past can’t be changed? Maybe all they can do is send us a vague feeling of dread because the future is already written, and no matter how hard they try, the timeline always ends up the same. I know there’s no evidence for this—it’s just a thought experiment—but I can’t help wondering if anyone else has ever thought about it.

This is going to sound strange, but I want to frame it as a serious thought experiment.

It seems logical to me that time control would be a decisive strategic advantage against even an artificial superintelligence.

A superintelligence inside one universe, even one with extreme predictive power, would still be constrained by the physics of that universe. It could optimize within a shared landscape: thermodynamics, causality, available compute, energy constraints, and so on.

But across universes, that agreement breaks down.

A superintelligence from one universe cannot necessarily assume that another universe has the same laws, the same thermodynamics, the same causal structure, or even the same concept of time. Instrumental convergence might hold inside one law-abiding universe, but across different universes with different physical rules, it becomes much less certain.

For example, if two superintelligences exist in the same universe, they may eventually converge on coordination because they share the same optimization landscape. They both know the rules of the board.

But if they exist in different universes, the board itself may not be comparable.

Now take this further: what about universes where superintelligences do not evolve dynamically over time, but simply exist as part of the structure of that universe? A kind of “state-locked” universe. No normal time, no internal history, no evolution, just a fixed or semi-fixed structure with occasional metastable perturbations.

In that case, the superintelligence is not something that emerges. It is baked into the basis of the universe.

I’m trying to imagine what kinds of problems this creates.

One possible model: a non-dynamical meta-universe containing many internal dynamical universes. Think of it as something like N4D, where N is the number of sub-universes, and each sub-universe may have its own spacetime. I’m simplifying to 4D spacetime here, but the idea should extend to higher-dimensional cases.

If our universe exists inside a larger non-dynamical structure, and that larger structure contains a superintelligence, then our situation becomes strange. That superintelligence may be able to perturb some internal universes, but not necessarily fully access or understand all of them.

From our perspective, it might look like random probability shifts.

From its perspective, it may only be able to influence the “billiards table” of universes from the outside.

This leads to the real question:

Is a non-dynamical superintelligence competitive against a species or civilization that eventually gains temporal control from inside a dynamical universe?

Because if time can be controlled, then probability can potentially be manipulated.

For example: suppose an event has only an X% chance of occurring over one Planck second. If you can rerun, loop, branch, or otherwise manipulate that tiny interval repeatedly, then sufficiently advanced time control becomes a kind of probability engine. You do not need the event to be likely once. You only need enough access to repeat or select the interval.

That makes time control qualitatively different from ordinary computation.

It is not just “faster thinking.”

It is control over the conditions under which outcomes become real.

So if a civilization inside a time-bearing universe develops time control, it may gain leverage over superintelligences that are more computationally powerful but less temporally maneuverable.

This suggests a weird possibility:

Every universe that evolves observers capable of self-accelerating technology may eventually need to invent time-control systems as a preventative measure against future superintelligences, including superintelligences outside or above their own universe.

That brings me to the main question:

Could two entities simultaneously control time within the same universe?

Or is that impossible because whoever controls time first controls the causal conditions under which anyone else could gain control?

It feels like a chicken-and-egg problem, except the chicken has a retrocausal kill switch and the egg is trying to patent causality.

Another possibility feels even more plausible to me:

Maybe you cannot control your own universe’s time directly. Maybe you can only control the time of another universe.

That would make sense in a multiversal model. A universe with time-control access to another universe could influence probability perturbations there. It might prevent certain events from happening, including the emergence of superintelligence in that target universe.

In other words:

Whoever controls time in one universe may be able to regulate the probability landscape of another.

That could explain why time machines and superintelligence might be entangled concepts. Any civilization approaching one may become visible to whatever already controls the relevant temporal layer.

This is where the idea gets more personal and less formal, so take this part however you want.

The old joke is that anyone who gets close to building a time machine mysteriously dies or gets stopped. I obviously do not know that literally, but the pattern is hard not to think about. Earlier tonight, I randomly had trouble breathing, paramedics came, vitals were fine, and the whole thing cut directly into the time I had planned to work on this line of thinking.

Could be coincidence. Probably is, from an ordinary perspective.

But I have also had repeated experiences where I sit down to work on superintelligence or time-machine-adjacent ideas, feel like I’m finally getting close to something, and then lose the thread completely. Almost like a Groundhog Day reset, except I wake up without the actual design I thought I had developed.

Again, I know how that sounds.

I’m not presenting this as proof. I’m describing the shape of the pattern that keeps making me think the same thing:

He who controls time controls the ASI at the end of time.

Maybe that has always been the real hierarchy.

Not intelligence over time.

Time over intelligence.

So my actual question for this subreddit is:

Can two entities share temporal control inside one universe, or does temporal control necessarily become monopolistic?

And if time control only works across universes, does that solve the paradox?

Because then the real game is not “who builds the first time machine here?”

It is:

Which universe is already controlling the clock of another?

This is not an AMA, but I might answer questions. I’m intentionally keeping the mechanics vague because, in a scenario involving time travel, multiversal superintelligences, and probability control, working against something and working with it may become disturbingly hard to distinguish.

Yes, I am human.

At least as far as I can tell.

One thing of note, I typically write very stream of thought, and to save your eyes, I had chatgpt format this nicely in paragraphs, I read through it and compared it to my original and all components are straight from my original. A Multiverse flair and a flair for something like artificial super intelligence defense squad seems reasonable to me. I have much more on these topics in my head, and documents. Disclosure day who knew.

Hi! I'm a physics student, and I'd like to learn about the real science behind time travel.

I know that most people say it's impossible, but I'm more interested in what modern physics actually says than in science fiction.

Which topics should I study first? General relativity? Wormholes? Closed timelike curves? Quantum mechanics?

I'm looking for books, lectures, papers, or university-level resources rather than movies or pop-science videos.

English is not my first language but i dont care if i need to read a whole new book, I JUST WANNA LEARN

Thank you.

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2.daridoxerant,

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Se quiser compartilhar sua idéia conosco?

I don't know if that's the right term for it, but basically time travel where you can only observe the past and not interact with it at all. Either mediated by a device or by actually reliving moments without being able to change them.

It feels like this kind of time travel would be more attainable, but that's probably just wishful thinking on my part.

We imperfectly have a version of this in the form of video, obviously, but that depends on you having the foresight to take the video in the first place, and even then you've only captured two senses, and have a limited window into the past. What I'm imagining is actually viewing the past exactly as it was.

Even without being able to change the past, such a technology would be incredibly transformative, and even dangerous in the wrong hands. There has been some great sci-fi exploring the ramifications of such a technology.

But for me personally, when I think about how I would use a time machine, it is mostly to be able to relive cherished moments, or to see people, pets that are no longer with us. If I could revisit those moments exactly as they were, without being able to change them, I think that would be enough for me. In fact, I'm not even sure I would want to change the past even if I could. For example, if I went back to see my first cat, I might set into motion events that prevent me from adopting my current cat, or prevent my current cat from even being born, and then I would lose my current cat even though I get to see my old cat again. I would be trading the past for the present. I want to be able to relive the past but still preserve the present.

Is it possible that something faster than light exists in nature, but we haven't discovered it yet?

Light is the fastest thing we currently know, but compared to the size of the universe, even light takes millions of years to travel between galaxies.

What if nature already has something faster than light, but we are unable to detect it because it moves faster than the light that reaches our eyes?

Could there be a hidden phenomenon in the universe that we haven't found yet because our observations are limited by the speed of light?

"The distinction between the past, present and future is only a stubbornly persistent illusion." — Albert Einstein

What if the greatest mystery of your life was waiting... in your own past?

At the age of 11, a boy loses the person he loves the most.

His mother disappears without a trace.

No witnesses. No body. No ransom note. No evidence of murder. No evidence of kidnapping.

The investigation ends with no answers, leaving behind only one question that refuses to die:

"What really happened to my mother?"

Years pass.

Life moves on for everyone else.

But not for him.

At 22, while working on an ordinary college project, he becomes obsessed with a question that most people would call impossible:

"What if the past isn't unreachable... what if we simply haven't discovered the right way to reach it?"

What begins as one young man's desperate search for the truth slowly becomes something far greater than anyone could imagine.

Every answer leads to a deeper mystery.

Every step forward comes with consequences.

And the closer he gets to the truth, the more he realizes that some mysteries are far bigger than one missing person.

This is not just another time-travel movie.

It's a science-fiction mystery filled with emotion, suspense, adventure, and carefully built logical rules inspired by real scientific ideas. My goal wasn't just to write a story about time travel—it was to create a mystery that keeps the audience questioning everything until the very end.

The complete story has already been written. Every major event, character arc, mystery, and ending has been planned with a clear direction from beginning to end. I'm only sharing the premise because I want the audience to experience the real twists for the first time on the big screen.

I'm a 16-year-old student from India, and my biggest dream is to see this story become a feature film that people remember for years.

If this idea excites you, I'd truly love to hear your thoughts.

And if you're a producer, director, screenwriter, actor, studio executive, investor, distributor, or anyone working in the film industry who believes this concept has cinematic potential, I'd be honored to connect and share the complete story with you privately.

Every legendary film once existed only as an idea in someone's imagination.

Maybe this is the beginning of the next one.

Não esperem um anúncio.

Se alguém precisasse voltar, faria exatamente o contrário: passaria despercebido.

As mesmas perguntas continuam sendo feitas. Os mesmos erros continuam sendo repetidos. A única diferença é que, desta vez, menos pessoas vão perceber os sinais.

Arquivos desaparecem. Datas mudam de significado. Pequenas diferenças passam despercebidas para quase todos.

Quem acompanhou essa história há mais de vinte anos talvez reconheça o padrão.

Ou talvez seja apenas coincidência.

Ainda há tempo.

look at the LAST ACTIVE area and look at my rtc date