From a standpoint of physics, it seems to be a given that time travel to the future is possible. In fact we are traveling forward in time right now, it is also possible to basically press the fast forward button if you were going fast enough relative to where we are on earth. Time travel to the past seems to be a little more complicated. Most physicists say that time travel to the past is impossible or very difficult.

If we look at it from a philosophical perspective, the most common example people use is the grandfather paradox, if you were to go back in time and prevent your grandparents from meeting, that means you don’t exist which means your grandparents do meet which means you do exist. Another paradox is the bootstrap paradox. If I were to go back in time to 1999 and I gave Steve jobs the blueprint for the iPhone and Apple released the iPhone in 1999. Effectively the iPhone would have no origin point. It wouldn’t be from Steve jobs because it was designed from the blueprints I gave him. It wasn’t from me because I just gave him the blueprints.

A solution to these paradoxes are that effectively, it would create another universe where that is true. But I have a problem with this school of thought because at that point, it’s not time travel anymore, it’s traveling to another universe. Another solution is that these paradoxes I mentioned are physically impossible, that you are prevented by the laws of the universe from doing this and I could see that but this would infer the fact that everything that happens in the present is predetermined and we don’t have free will.

When I say “data”, I mean coordinates of every single atom, atomic structures, subatomic elements at single given time; What you were doing, thinking, how the world around looks like at a specific. Kind of like a safe file in a game.

If we are able to travel to the past, there has to be a “save file” somewhere in the universe in order for everything to be in the exact place they are supposed to at a specific time. The universe has to be able to “remember” where everything is in the first place.

Maybe the “safe file” is already ingrained into every subatomic elements, and time travel is just reverse entropy. If that’s the case, then the only way to time travel is reverse the entropy AROUND you. That would take infinite energy. It would also mean that subatomic elements can store infinite amount of information regarding their position in the universe in relations to a specific time.

If there isn’t a “safe file” to tell the universe where things are suppose to be at a specific time, then maybe time travel can be explained by the multiverse theory. Time travel would be jumping a universe where the current “furthest time” is when you wish to jump to. For example, if you want to jump to 9/10/2010 10:20pm, you would be jumping to a timeline where the current “furthest time” is that. That time is the furthest time in that timeline when you arrived. There is no future for that time line yet as it still developing when you arrived. But that means, in order to even find a universe that is the “current furthest time” is exact time you want to go to and with the same “data”, it would take infinite energy as there are infinite universes in the multiverse theory.

I really enjoyed this anthology.
Anyone else familiar with the title?
The Time Traveler's Almanac

The main argument against time travel is that any change to the past would inevitably erase you from existence, let's imagine you've travelled to 1865 to prevent the assassination of president lincoln, there's a lot of ways for that to happen, the one guard he had doesn't abandon his post, or grant accepts the invite and brings along the security needed to scare away booth, either way, this would change a lot of things, so how do we avoid a paradox?

What if Satoshi Nakamoto is a time traveler used a time travele text machine !

Lucid dreaming. For those who don't know, it's when you have a certain control on yourself and your consciousness when you're dreaming and with that control you can do things knowing that it's a dream.

Some of you might suggest that having a totem can help differentiate whether its a dream or reality but a totem is only a person's secret and for reminding themselves, but what about if you want to convince someone else.?

A while ago, I was really sick and had trouble sleeping. That day when I somehow managed to fall asleep, I was lucid dreaming and I could actually do things in that dreams.

In the dream, it was day time, cloudy, no bright sunlight, there was a building and I was on the1st floor of it. I was in a classroom which was from my school (5th standard). In the classroom there were a bunch of people that I knew, from school + bunch of people from my college life as well. And I was sitting with one of my school friends.

When I became aware that it was a dream, first of all I tried to felt the air/atmosphere in the dream, by waving my hand. It felt like I'm in a fluid or something. Like water or gelly, but I could only feel the density but not the matter on my hands. After that I looked around at the people and then I went to sit next to one of my friends who I lost contact like years ago. I said to him that you know we're in my dream, all of this is not real, it's just in my head. And he was saying something totally different and untelated but I couldn't understand anything, words from people were feeling like murr murr as if they were all underwater and couldn't talk. I tried to shake him by grabbing him on shoulder and I could still feel the density of the atmosphere while I was shaking him off. Then I went on to another person and tried telling him the same and got the same response. And then I started thinking how can I convince someone that this is a dream. I even told him that we haven't met for years and this is the first time in like so many years that I'm seeing him and even this is a dream only. He smiled and nodded but as if he was listening to me but was in its own vibe or something. I also told him somethings about the place and people like this is the classroom that we used to sit back in 2008 in 5th STD and some of the people he doesn't even know because they're not from this time They're from my different time of life. Then I kept thinking how should I convince him that it's a dream,and even if I do convince him what's next !?

After this struggle to prove that it's a dream, I went to the corner of the room where there's a window and I looked down to found out that I was on 1 St floor of the building and down there is the road and a lampost. As I stared down there I slightly lost control of my conscience and I somehow teleported to that lampost that I was just looking at. Now, I was on the road staring at the building window where I was just there. Now I started following the road towards the street, the building and the whole place was totally different that whatever I experienced in reality. I never been to that building, my classroom and school were never even close to how they were looking in the dream. Even the street and other houses. And yet somehow I knew all the buildings and shortcuts as I've been there. I started running on the road towards the street which was a narrow street with old Indian street architectures around. I was not exactly following the road, I went into a house yard and up the stairs and I was moving roof to roof now. I also tried flying. For me flying isn't exactly like flying because I always thought of it in logical way that even if flying was possible how could a person fly, there has to be zero gravity, but on earth it wasn't possible so basically we'll have to either jump or push ourselves against the force of gravity, which isn't also very easy. So I jump and I was able to jump really high and was also able to push gravity enough to move in the air like flying. So basically in my head the concept of Flying was somehow rigid and I believed it to be as it is, so evenin dream I could let go of it and was using the same concept to fly around. And even doing this I was in control, I was just jumping from roof to roof while flying. Then at a certain turn in the street I woke up from the dream.

I've done Lucide dreaming before this as well, but this one was a bit intense because of the way I was in control. I remember flying around in my other dreams as well. I jump really high to fight people or constantly running away from things. And even once I remember being in control and kissing someone, and it was wayy before I had my first kiss in real life, I was able to experience it in my dream and it felt so real and just amazing.

This particular time, I was sick and on meds so I guess some of the meds were somehow helped me to stay awake even in the dream while some were keeping me asleep. While dreaming I also remember knowing some things that I don't remember now, like I had access to certain memories about people and places, which I don't remember anymore I can't remember, I tried. As much as it was a dream I was also in doubt that it was a different dimension or reality altogether where I was someone else or just me with a different life. It was an amazing experience.

already watched back to the future trilogy.

If you went back and shot yourself. Obviously your future self would not exist. So what would happen to the body?

For example, if i want to solve a case like Joanna Lopez, a missing person since 1989 only shown on TV with a creepy picture and a phone number which is out of service right now, could i travel to the time she went missing and call that number? Or try to find out if Selene Delgado was a real person by calling Canal 5 in 2001? Could this destroy the flow of space and time if i try to solve these cases in the past?

My theory on time travel is that if you consider time to be almost like the shockwave of an explosion, in the sense of, the center would be the beginning of time, and the expansion outwards is the combination of time (distance from center) and choices (various directions).

We could consider ourselves to be at the edge of this "time wave" (the true present) ,which would mean that nobody can come from the future, because the future hasn't happened yet. So with this theory, it would mean that until we create time travel in the true present, on our branch or another branch of choices, we wont see any evidence of it. Because time travel has not been created yet.

But this would also sorta imply that traveling into the future (past the edge/past true present) might not be possible, unless you are traveling from the past to the present, which would be the future of the past. But not the future of the true present.

I hope i explained this idea well. But if not i can try to break it down more. Just wanting to hear your thoughts on it.

If anyone is in the Las Vegas Area, I’ve heard rumor that there is a Time Machine about 20-25 miles West (I think West) OUTSIDE of Area 51. If anyone’s in the Las Vegas area please reach out to me, I’m actually at a hotel tonight and have been trying to time travel for MONTHS now.

I’m with 1 other person. I drove from WA state, to Tennessee, TO Nevada, and I have funds saved up to keep searching. Please DM if you have info, I’d be happy to meet in person or just DM if you want to feel safer. But regardless if you know about this in any matter please message me.

Let's say some old grandpa approach you and tell you that he is you from the future.

1. Do you have any question in your mind that you can ask him and be sure that's you?

2. Maybe you are sure that nobody currently knows answer for that question, but do you know you will never ever tell nobody?

What will be the question? Let's say that you have only one minute for verification, so you can't ask billions of questions.

I know we have a dedicated section for ‘real’ time travelers, but my question to you is what would you accept as proof that someone is from the future?

Would a shiny new gadget do it? Or a very specific prediction?

I'm once again recommending this great novel by Elan Mastai. This is a great example of time travel in which you can change the past to the point that time travel wouldn't be invented but that doesn't result in a paradox. The time traveler in this book, goes back in time, screws up everything and returns to the time he left from, remembering everything that changed in the world. It's a fun read and I'm still waiting for the mini series that was supposed to made from the book.

If time travel should be possible, then, it's already been done within that possible future, and the present has been changed from the past, and we would never know the difference. With it done, the possibility of creating time travel from that point depends on if the technology was passed along or destroyed, either in part or total. Passed along or partially destroyed, then, time travel would eventually be used again at a sooner rate than before, restarting the sequence through an earlier phase in the timeline. If the technology is destroyed, then, time travel would still be a possibility, only it would take place further down the timeline from the initial happening. All resulting in a race of beings constantly erasing their futures. That's what I think. Your thoughts?

Even if humans were able to go back in time they wouldn’t be able to recreate the eras that occurred.

It would be the same as moving the minute and hour hand backwards, nothing else.

It feels like most time travel things I read claim so many negatives. If in the future people can time travel, who says it wouldn’t be incredibly boring? Meaning, you visit the past and no earth destroying things happen. It feels like we’ve taken hold of the Sci-Fi dangers and run with them. Are there any theories that say, “It’s no big deal?”

I was 10 years old when BTTF came out and loved it as a kid . Now as an adult I almost think the movie is pointless . When Marty traveled back to 1955 and met up with Doc , from that time forward Doc knew it was going to work . 1955 seems to be the reset point . So does that also mean that while Doc was fine tuning the time machine that maybe he changed Marty’s parents future or even Marty’s and it took Marty going back to 1955 to reset the events .

So I’m sure some have heard of the idea that every new decision creates a new timeline. If you choose to eat waffles for breakfast you just created new timelines where you ate pancakes or eggs.

So basically what if every action done by a time traveller causes a new timeline to be created thus preserving the original timeline. How would they not disappear if they killed their own parents? Well there’s still a timeline where that didn’t happen that you can always return to.

I imagine most time travelers would try to remain anonymous but you know occasionally we get LARPers who take it one step too far. I mean don't get me wrong I'd love to find a time traveler to help me out but I like many others am in bargaining stages of grief. But who knows maybe time travelers like to just lurk and browse other subs for fun when they visit this time period without feeling the need to advertise.

Wasnt entirely sure how to tag this, but while i do believe a paradox loop like the grandfather paradox could eventually resolve itself somehow. I thought about another use for time travel that would be useful and thats using it to figure out all the unexplained disappearances and cold cases, cant prevent them without paradoxing yourself but you could witness and bring that information back to the present to provide closure in those incidents.

Hi. I'm the writer of The Dial-Up Fiction Podcast. Thanks to all my listeners from this sub:

https://pod.link/1617863362

I'm currently about to begin writing the 3rd season of the show, where the main character ends up talking to his future self, on an online voice call.

I watched Looper (2012) for inspiration, but was wondering if there were any other films/tv shows/books which have a similar premise of a character being able to communicate with their past, or future, selves.

Please do send me your recommendations, or any relevant articles/theories!

Thanks!

Who says the people in the future would care that much about Hitler anyway? We never talk about time traveling back to kill Genghis Kahn. Maybe WWii is so far in their past, it is just another one of those crazy things those uncivilized primitive humans did.

No crazy paradoxes or twilight zone type twists. You kill baby hitler, you prevent the holocaust. No one else takes his place because the timeline will always heal itself. Same with bitcoin, you buying that much doesn't change how much it is valued today. In both instances, you come back in time to when you left. A surprising amount of coworkers chose the bitcoin.