/r/timetravel

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Time travel reddit will exist yesterday

Welcome to Time Travel

DEFINITION

"An object time travels if and only if the difference between its departure and arrival times as measured in the surrounding world does not equal the duration of the journey undergone by the object."

---The Internet Encyclopedia of Philosophy


OVERVIEW

This subreddit is about time travel.

Specifically, it is about the philosophical, scientific, technical and metaphysical aspects of time travel, with a sprinkling of media references to help things along.

Join us here to discuss the topics that will one day allow us to explore the four-dimensional continuum - or at least get older trying.

Please note that this is a non-fiction subreddit.


POSTING GUIDELINES

Here's a summary of the types of post that are appropriate and not appropriate for this subreddit:

THEORY posts. These involve discussion of a particular theory of time travel. This may be philosophical, scientific, technical or metaphysical.

DISCUSSION posts. These posts involve raising a topic for discussion, maybe in the form of question or speculative scenario. "What ifs" and "What would you dos" are appropriate. here.

MEDIA posts. This may consist of discussion of or links to fictional or documentary material that's relevant to the subreddit, such as films, books, TV series, exhibitions.

META posts. For posts which are about the subreddit itself or broader issues relating to the topic.

ARTICLE posts. These are any links to articles about time travel found elsewhere on the web.

CHALLENGE posts. Challenge posts are to discuss and clarify various challenges related to time travel. Discussions of tomorrow's newspaper, Dinosaur video, Time Machine schematics, and future predictions all fit this tag.

No fictional or AMA-style posts. You are very unlikely to be a time traveler. And if you are, we are only interested in reading highly detailed posts about the technical and theoretical aspects involved. Please send a mod message if you wish to do an AMA post. Claims without proof will be ignored and removed. This is not a creative writing sub. Links to claims and hoaxes elsewhere on the internet are fine.

This last point includes broken clock posts. A broken clock (one not telling time properly) is not a sign of time travel, and making such a claim falls subject to the roleplay/fiction and/or claims (which require evidence, more than just your clock). Clock posts showing the results of time dilation experiments are allowed.

If you wish to have more relaxed rules and freely make claims, visit /r/timetravelhub.


FLAIRS

🟥RED FLAIR🟥- common theories and claims

🟦BLUE FLAIR🟦- posts with sources in physics

⬛GRAY FLAIR⬛- culture, RP & meta


CHAT ROOMS

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/r/timetravel

121,581 Subscribers

1

Europa Park Rust 1986

0 Comments
2025/02/02
12:13 UTC

0

Time Isn’t Linear—The CIA, Bentov, and the Science Behind It

Alright, let’s clear this up once and for all. I was banned from participating after I posted this: https://www.reddit.com/r/timetravel/s/m02KaOEN9O so I could see all your responses but I couldn't respond. Here's my response and this will probably get blocked to but at least I did what I always do: provide proof for everyhting I say.

There’s a reason people like the CIA, physicists, and mystics keep circling around the idea that time isn’t what we think it is. And no, it’s not just “woo.” It’s research.

The Gateway Process report, declassified by the CIA, leans on Itzhak Bentov’s work to describe consciousness moving through time as a hologram—not as a straight line. This is crucial. A hologram encodes all moments simultaneously, meaning that our experience of time is about shifting awareness, not “moving” through a sequence.

Bentov’s book Stalking the Wild Pendulum goes deeper. He describes the universe as a self-referential toroidal system (think: a cosmic "donut") where consciousness spirals through time, not just marching forward like some dull, linear movie reel. I've compared it to a stack of pancakes, a CD and in my debut book out now, I call it The Spiral. Instead of "time" going in a straight line, the oscillations of human consciousness sync with universal wave patterns (which are spherical), meaning what we perceive as "the present" is just a frequency band we’re tuned into.

Now, if you’re clutching your pearls over the word torus, let’s break it down:

A torus is just a shape that allows continuous feedback loops (ummm...what shape are Froot Loops again?).

Bentov uses the concept of a torus shape to describe the cyclical motion of consciousness and time. The Gateway report (CIA) borrows Bentov’s model but simplifies it, calling time a hologram instead of directly naming the toroidal structure behind it.

The people who blocked me will say, “But the CIA report doesn’t say ‘torus’!”—as if removing a term erases the concept. That’s like arguing Einstein never described relativity, just because he didn’t use the exact wording found in a high school physics book.

Here’s the bottom line:

The Gateway Process acknowledges time is holographic and non-linear.

Bentov, whose work influenced the report, explicitly describes spiral and toroidal models of consciousness interacting with time.

If you’re demanding the exact phrase "time is a sphere", you’re missing the point—holography and toroidal motion imply multi-directional, recursive time flow, which is the real argument.

For those who actually want sources:

  1. CIA Gateway Process Document

2. Itzhak Bentov – Stalking the Wild Pendulum (Full Text)

  1. The Physics of Toroidal Energy Fields (For the Nerds, like me)

Read. Learn. Expand your perception.

#howdoyoulikethemapples

9 Comments
2025/02/02
04:42 UTC

21

I personally believe we do have time travel technology here on Earth, and we’ve had it for a long time, it’s just that a select few people on have access and control of it!

Movies aren’t just entertainment, but I personally believe we have different forms of time travel technologies and movies are showing us how many forms we’ve got?

51 Comments
2025/02/01
22:50 UTC

6

If Time Were Tangible…

Imagine if time were something we could touch, yet never feel. A silent companion, always present but just out of reach. What if its flow wasn’t fixed but danced to the rhythm of our emotions?, Rushing forward when we’re lost in joy, dragging endlessly when pain lingers. Would we hold onto it tighter, or let it slip through our fingers? Time isn’t just numbers on a clock—it breathes with us. Its speed is shaped by the way we live, its weight defined by our choices. To some, it’s a fleeting breeze; to others, a heavy storm. So, if time bends to our thoughts and feelings, Then perhaps, the secret isn’t in chasing it… But in living in a way that makes every moment count.

4 Comments
2025/02/01
10:40 UTC

2

Timelines/Changes/Mandela Effect Idea

So I had this thought, and I'm curious what anybody thinks: Suppose, hypothetically, somebody was tampering with your timeline. They go back and change A to B. You wouldn't notice the difference, because, now, from your perspective, it was always B, right? Then, they continue to make more changes. How, in that situation, could you attempt to keep track of the changes? Is there any way you could preserve the knowledge through the changes?

6 Comments
2025/02/01
05:49 UTC

5

Time Travel Cannot Exist

Hi guys, I know this thread has shifted more towards fictional thoughts and populism instead of hc science, but what do you think about my thesis below?

Abstract:

This text explores the fundamental reasons why time travel, as popularly conceived, is not possible. Drawing from discussions about the nature of time, motion, and the structure of the universe, I've concluded that time travel is an untenable concept due to the absence of universal reference points, the dependence of time on motion, and the lack of mechanisms to store and reconstruct past states of the universe.

Introduction:

The concept of time travel has captivated human imagination for centuries. From philosophical thought experiments to science fiction narratives, it raises profound questions about causality, reality, and the nature of time itself. However, a closer examination of the mechanics of time, motion, and entropy reveals that time travel, in both forward and backward directions, is fundamentally incompatible with the known laws of the universe.

Key Arguments:

  1. Time is a Construct Dependent on Motion:
  • Time is not an independent entity; it is a parameter we derive from observing motion and change.
  • Repeating motions, such as planetary orbits (day, month, year) and atomic vibrations, provide reference points for measuring time.
  • Without motion or change, the concept of time collapses, rendering the idea of "traveling through time" meaningless.
  1. Lack of Intrinsic Direction in Time:
  • Physical laws, such as Newton’s laws of motion and quantum mechanics, are time-symmetric—they work the same forward or backward.
  • The perceived "arrow of time" is tied to entropy, a statistical property rather than a fundamental feature of reality.
  • Without an observer to perceive change, there is no inherent "past" or "future" direction in the universe.
  1. No Universal Reference for Time:
  • Einstein’s theory of relativity demonstrates that time is relative to the observer’s motion and gravitational context.
  • There is no universal timeline or "cosmic clock" to define when events occur.
  • Without a global reference point, the idea of "traveling" to a specific moment is incoherent.
  1. Absence of a Cosmic Database:
  • Time travel requires the ability to restore the universe to a precise past state.
  • For this, the universe would need a "cosmic database" to store the states of all atoms and their relationships at every moment.
  • Such a database is implausible due to the universe’s decentralized nature, the loss of information through entropy, and the sheer scale of data involved.
  1. Irreversibility of Entropy:
  • The second law of thermodynamics dictates that entropy increases over time, making past states irrecoverable.
  • Reversing entropy to "travel back in time" would violate fundamental physical laws and require rewriting the entire universe’s state—a feat beyond physical possibility.

Conclusion:

Time travel, as a concept, is fundamentally flawed when examined through the lens of physics and philosophy. Time is not an absolute dimension but a construct tied to motion and observation. The universe lacks the mechanisms—such as a universal reference point or a state-preserving database—necessary for time travel to exist. Furthermore, the irreversibility of entropy and the relativity of time make the reconstruction of past or future states impossible. Ultimately, time travel remains a fascinating thought experiment but is not achievable within the framework of our current understanding of the universe.

Implications:

This conclusion not only challenges the feasibility of time travel but also provides deeper insights into the nature of time, motion, and the universe itself. By rejecting the possibility of time travel, we are prompted to reconsider how we perceive the passage of time and our relationship to it.

6 Comments
2025/02/01
04:56 UTC

9

The Impact of Time Travel on Parallel Universes, Is Presence Alone a Disruption?

Do you think it's possible that the act of time travel itself, regardless of interaction with the past, creates a new parallel universe? Even if no changes are made in the past, the very presence of a time traveler in a past timeline—someone who logically shouldn’t be there—could still constitute an alteration in the timeline. Would this suggest that time travel itself is inherently disruptive and causes a divergence, automatically creating a new reality or parallel world, even if no observable changes occur?

8 Comments
2025/01/31
23:58 UTC

4

Gold Bar Paradox

Lets say I could time travel and I purchased an old stamped gold bar in 2025 and I took the gold bar back in time with me to say 1976 and also obtained the same stamped gold bar when it was new and destroyed the gold bar in 1976, Would the gold bar I purchased in 2025 vanish before my eyes or would it be paradoxical and therefore exists but shouldn't.

Let's say I purchased the gold in 2025 and put it in my time machine and traveled back in time 10 minutes and bought the same bar of gold and continually went back in time purchasing the same bar of gold would I have the same Bar of Gold times how ever many times I went back in time or would the universe implode

24 Comments
2025/01/31
22:04 UTC

25

Do you ever worry that....

someone might go back in time and destroy your younger self, wiping you from existence and completely undoing all that you have accomplished up until this point in time?

45 Comments
2025/01/31
22:00 UTC

5

There is a way to save a person in the past without creating a paradox or even a new timeline!

You don’t have to save the person but what you can do is to encourage another person, to SAVE the individual thereby bypassing the paradox! Time can be rewritten! All it does is reroute the river of time just a little for it to flow back the way it did in the previous timeline! You of course would if you’re using the Mobius strip would then be able to return back home and resume from where you left!

35 Comments
2025/01/31
19:40 UTC

8

What would happen if you gave yourself the idea of time travel for no reason?

It's hard to articulate but imagine if you've always had an idea on how to time travel since as long as you remember and then you actually successfully access it using these means, your first order of buisness is to implant the idea of what you did into your younger self's mind. Does this solve the bootstrap paradox?

I'm basically implanting this knowledge for no actual reason. Just like a simple precaution and I'm not handing myself a Time Machine just putting myself on the right track with the idea that'll eventually lead to it

18 Comments
2025/01/31
15:01 UTC

32

The only way to successfully change the past is if you send a message to the past younger version of yourself, so the present changes so you don’t disappear but change due to the new decision being made!

Time travel is all Wibbly-Wobbly-Timey-Wimey-Stuff!

31 Comments
2025/01/30
23:48 UTC

10

Who would ya say has the most accurate Time Travel explanation in all of fiction?

Come, let’s talk about this down here!

29 Comments
2025/01/30
23:22 UTC

1

Have anyone seen this and know the name?

0 Comments
2025/01/30
22:55 UTC

39

If I recieved a book from my future self about how to create a time machine and...

I just had a 3am thought....and.... I need answers so, If I recieved a book from my future self about how to create a time machine and after 10 years i create a time machine and go back 10 years in past and give that book to my past self.

Who wrote the book? How did it originate..

But...but..BUT!! Since the book will keep getting older and older and more janky torn etc. there will come a time when the book will be unreadable, thus I won't be able to create a time machine and the loop will break...but....since the loop broke...it means it wasn't a loop from the beginning...

If the loop has an end...it must have a beginning too?

I might look like I'm trying to sound deep but I genuinely need answers 🥹, please tell me if Im just dumb or I'm onto something?

26 Comments
2025/01/30
18:31 UTC

3

What’s your favourite slip story?

1 Comment
2025/01/30
16:44 UTC

5

I feel like sending objects back in time would be more difficult than actually going back in time

With time travel I can somewhat perceive the idea of sending your mind back in time somehow. Returning to a previous point with your memories in a younger body but objects themselves would be more difficult

You'd effectively need to exclude them from the travel somehow maybe anchoring it DEEP and having it somehow excluded from time reversing as it hangs onto the earth reversing at Mach fuck

2 Comments
2025/01/30
02:35 UTC

0

Can you donate for a time travel project?

Would anyone be willing to donate for a time travel project?

41 Comments
2025/01/29
23:00 UTC

6

Is there a way to change the past without creating a paradox or creating an alternate timeline?

As long as you use the Mobius strip and a Time GPS combined with Quantum Mechanics and Jumping then you can actually go to the past without any problems whatsoever! There’s also the fact that if you do go back to the past and make small changes/ripples that the river of time doesn’t alter at all and time just flows normally like nothing had happened, no paradoxes or Butterfly effects! Interacting with your past, even just giving them some advice doesn’t affect anything as long as it’s a positive interaction, time just accommodates for that little change and the stream just moves on like nothing ever happened! Little footsteps on the beach and the sea just washes the footsteps and repairs itself so to speak?

34 Comments
2025/01/29
21:06 UTC

8

Exploring the implications of a scientifically-plausible time machine (T-Mach)

My debut time travel novel just hit #4 in Sci Fi books on Amazon!

I have been working on a series of time-travel novels for the past decade, an attempt to explore some of the complexities that might come from really being able to travel back into the past.

While I have yet to crack the specifics of a workable method for journeying to the past (for now), I teased out a plausible time travel method by working backwards.

  • The time machine would clearly require a lot of power so was built in the shadow of a nuclear reactor with large banks of capacitors accumulating charge for a sudden release of energy.
  • Time travel would work by creating a spherical wormhole through which to drop my budding time-travellers (Chronomads). The Chronomads would be crouched within a spherical pod designed to occupy as much of the wormhole space as possible, along with the precious few possessions they could bring back with them.
  • The wormhole would be generated using a spherical array of particle accelerators concentrated upon the centre of a giant spherical cavern. The cavern would need to be under vacuum to enable the particles to accumulate unimpeded into a critical mass for blackhole creation.
  • The resulting blackhole would be handwavingly stitched with a primordial whitehole and ‘steered’ to the correct time and location through a number of calibration experiments.
  • Despite being advanced enough to achieve such nuanced space-time manipulation (taking into account planetary movement and cosmic expansion), there would still be enough remaining uncertainty that the Chronomads would need to arrive at elevation to avoid arriving within the earth. This means that the Chronomads’ pod would have a parachute attached for deployment once reaching the past.
  • Energy requirements would mean that the wormhole could only exist for a split second. Once the wormhole reached a sufficient size, the Chronomads’ pod would be dropped through it before it dissipated its energy and snapped shut.
  • This small window of time would provide a fleeting glimpse of the world on the other side, allowing diagnostic equipment to take measurements and determine the precise time and location that the Chronomads had been sent.
  • Once closed, attempting to reopen a wormhole at the same location would risk disrupting the space-time curvature that saw the Chronomads’ save traversal. This means that they could not be contacted again and, without a giant time machine and nuclear reactor waiting for them in the past, they would be stuck there for good.
  • Time is a relative phenomenon so the journey would create a new timeline for the Chronomads whose actions would rapidly alter their new timeline and make it causally disconnected from their original timeline, meaning future Chronomads could not join them later in their journey.

This all means that the Chronomads are only able to journey back to the past with the few possessions that can fit within their pod. The journey can only be one-way, meaning the Chronomads must volunteer to bid farewell to all family and friends from their original timeline.

My novel CHRONOMAD ONE: THE WORLD THAT WAS explores the implications of this one-way journey to the past, an attempt at a Hard Sci Fi look at what a journey to the past might truly be like. Is it plausible to run straight to the King? Can a time traveller really create modern technologies from scratch? Can a single person really change the future?

https://preview.redd.it/ax3xpol0hwfe1.png?width=631&format=png&auto=webp&s=83b753ca5d2f1e015f0a158bf086d63e80128ad0

8 Comments
2025/01/29
09:16 UTC

8

It seems someone is going too far

Well saw this shared and maybe we are already there

https://chatgpt.com/share/6791b6b4-9570-800f-93a1-43781860969f

seems like someone (or several) people are trying to make a time machine

19 Comments
2025/01/29
03:30 UTC

13

Time travel could exist but we’d never know.

The human mind is constructed of atoms. Well, everything is made of them. Atoms are essentially immortal. To travel to any point in time is to travel to an arrangement of atoms. The ones that make up you were somewhere else, in another body or plant or dirt, 100 years ago. If you were to rewind time, you’d be removing the atoms from their current position, making up your body, and placing them in their original position. So, if you were to rewind time, everything would be as it were at the time, you wouldn’t exist, and nobody would know.

To by get around this, you’d either have to exclude your atoms from the reversal but, that causes problems for where they were so you haven’t gone back in time exactly. Or, you could figure out how to create atoms and create an exact replica of yourself and attempt to somehow prevent them from not existing when you rewind all the other atoms in the entirety of existence.

48 Comments
2025/01/29
02:33 UTC

5

Reaching infinity paradox (?)

I'm sure there must be something wrong with that paradox, but i cannot see it

Assuming that time travel works like as seen in Dark or Harry Potter, where going back in time produces the causes the led things to be exactly as they always were, meaning you can't really change the past or create branches.

What if I go back 30 seconds to the past and told myself the number 1, and asked myself from the past to do the same, but saying the next number. What would happen? Would we be able to know how many iterations of the loop happened already based on the number? Something would go wrong? I would become my own grandfather?

7 Comments
2025/01/29
01:11 UTC

2

I’m just posting this question to outlet my frustration.

I think about this way too much so I’m going to put it to a vote

View Poll

30 Comments
2025/01/28
18:06 UTC

0

if i commit to have my kids tell their kids and so on to time travel to this exact point to prove time travel will at some point be possible and it doesnt happen does that mean it wont be ever be possible because its not happening?

as title states

5 Comments
2025/01/28
09:33 UTC

8

if i commit to have my kids tell their kids and so on to time travel to this exact point to prove time travel will at some point be possible and it doesnt happen does that mean it wont be ever be possible because its not happening?

as title states

41 Comments
2025/01/28
09:33 UTC

1

CarL

0 Comments
2025/01/28
06:45 UTC

2

What’s the time frame do you think for “inventing” future tech

If I brought something from the future or an alternate timeline that's a crazy breakthrough in science what's the time frame do you think where I'd have to pretend to invent it so it sinks into just kinda being mundane despite crazy advancements compared to 30 years ago like iPhones

8 Comments
2025/01/28
06:05 UTC

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