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Time travel.
Is it possible? May 17 14 08:12 pm Link You have traveled in time already, true? Yes, it is not only possible but according to our concept of time it is impossible to NOT travel in time. May 17 14 08:13 pm Link HV images wrote: If it were possible someone would be making a profit from it right now. May 17 14 08:42 pm Link May 17 14 08:50 pm Link HV images wrote: Not yet. May 17 14 08:51 pm Link HV images wrote: You and me. And all of MM. We are doing it right now! May 17 14 08:52 pm Link Someone may yet show up for Stephen Hawking's 2009 party. May 17 14 08:54 pm Link NothingIsRealButTheGirl wrote: But we'd never know. May 18 14 05:35 am Link Physics doesn't rule it out. Trap Doors in Time and Space: Teleportation, Time Travel, and Escape from Black Holes http://www.pbs.org/wgbh/nova/blogs/phys … ack-holes/ "time travel is actually allowed in Einstein’s theory of general relativity: space times can possess closed timelike curves which you can enter in the future and exit in the past." New Direction in Physics: Back in Time (from 1990) http://www.nytimes.com/1990/08/21/scien … -time.html "THE possibility of traveling through time, of creating something out of nothing and even of spawning a new universe in a laboratory are notions ordinarily reserved to fiction rather than science. But a rash of articles in some of the most prestigious scientific publications suggests that theoretical physicists have begun to take such outlandish ideas seriously." Retrocausality Could Send Particles’ Information Back to the Future http://www.pbs.org/wgbh/nova/next/physi … he-future/ "Some physicists believe entangled particles might travel back in time to exercise power over the past." Arrow of time: Forward and back http://www.nature.com/nphys/journal/v5/ … s1376.html May 18 14 06:10 am Link HV images wrote: maybe ask this guy... May 18 14 07:17 am Link Quantum theory does allow for the possibility of time travel but the theory only applies to things that are very, very small. Like electrons. Bigger things, like grains of sand or people or galaxies, exist firmly in the realm of Relativity which allows for forward time travel but not backward. May 18 14 07:29 am Link HV images wrote: I'm traveling through time right now. I'm older now than when I first read this thread. May 18 14 08:03 am Link CNP Photography wrote: ^ " The Grandfather Paradox" and the "no-cloning theorem." May 18 14 08:10 am Link The rate of "Time" that passes is different in different places. So yes. May 18 14 10:29 am Link I'm not one who believes it's possible but I do find the subject fascinating on many levels. I'll admit to having thought about it more than once. Then I saw the movie 12 Monkeys and was out of sorts for months after. I won't watch it again. May 18 14 10:32 am Link AdelaideJohn1967 wrote: Sure we would. If that happened in 2009 it would have made a big splash in the media and we'd all remember it. May 18 14 10:46 am Link NothingIsRealButTheGirl wrote: Shit, I better start doing my hair or I'll never make it. May 18 14 11:00 am Link This thread made me curious. So I tracked down and read Stephen Hawking's piece on space and time warps. The only part I came close to understanding in his paper was the posted limerick: There was a young lady of Wight, Who traveled much faster than light, She departed one day, In a relative way, And arrived on the previous night. Oh and maybe if we had infinite power it might be possible to time travel. But then I got lost again so I still don't know if you can go into the past. For now, I'll keep time traveling forward into the future on a one-to-one basis. May 18 14 11:20 am Link I've been traveling through time for as long as I can remember, just not in a flashy, showing-off kind of way. I even have a fez. May 18 14 11:25 am Link I have traveled from yesterday evening to the present time to bring news that time travel is indeed possible. May 18 14 11:55 am Link Nope, it's not possible. Regardless of what point in time we're at, it's always going to be today. May 18 14 12:06 pm Link Paul Bryson Photography wrote: Hey! A voice from the past! May 18 14 12:13 pm Link Monad Studios wrote: I got slagged and fragged, then respawned. May 18 14 12:25 pm Link Paul Bryson Photography wrote: And when we're tootling along in a car on a freeway, are we moving? We're still in the same car. May 18 14 03:00 pm Link Orca Bay Images wrote: Not if you put your car in reverse. May 18 14 03:05 pm Link  May 18 14 03:36 pm Link I don't think so. i reckon the physical world is a cross section of a higher world, and that all the matter there ever was or will be is eternally present. That means the past and the future only exists in a non physical form. You can't go back in time because there is no physical reality to go back to. The alternative is for matter and energy to be infinite - an entire new universe created every moment on top of the old, rather than the old transmuting into the new. Or, to put it another way, I don't understand how it could be possible. May 18 14 04:13 pm Link May 18 14 04:55 pm Link Yes May 18 14 05:07 pm Link Yes it is possible, but only in one direction. I have a device which I activate to be instantly transported 9 minutes into the future. I usually operate it each morning (especially Mondays). May 18 14 05:25 pm Link NothingIsRealButTheGirl wrote: You know in a very weird way that makes sense May 19 14 02:07 am Link Yes. Hop on the Train going to Willoughby. May 19 14 02:15 am Link Traveling back in time is not possible. Not with the set of natural laws of physics and well established theories that exist. Time is a strange thing. When you just sit around you travel mostly through time but as your speed increases you start traveling through space and time. At the speed of light you only travel through space. It takes no time (zero seconds) to travel any distance from the point of view of the traveler. Obviously only massless particles can travel at the speed of light. Photons for example. To travel back in time the time of travel would have to be a negative number. Which would mean that you would get to your destination before you left. And that is a paradox. Paradox in science means a no go. Traveling back in time would also break the law of entropy, one of the most fundamental laws of nature. Obviously we can never say never but with our state of knowledge talking about traveling into the past is pure speculation. And yes, they do speculate even in the respected peer-review scientific publications. Travel into the future is possible. Sort of. All you need is a really fast space ship. Kiss your family and set off to fly around for a year and half the speed of light. When you come back you will notice that let's say 5 years had past for people on Earth and you aged only a year. So effectively you traveled 4 years into the future. May 19 14 07:48 am Link Okay -- here's my sci-fi explanation: We experience "time" linearly -- 12:34pm is followed by 12:35pm and then 12:36pm and so forth. Our brains have evolved to think of time this way. At the same time, at any given moment, there are an infinite number of choices and/or events that happen. I can flip a coin, and it could come up heads or tails or land on its edge and so forth. Each outcome can split the universe into separate universes (universes, not "timelines"). Therefore, with that observation, it's like we are strapped onto a train facing backwards -- we "know" what's happened in the past, but we can't see ahead into the future. And given how the universe is dividing into separate universes all the time, that train could take any one of an infinite number of paths. Meanwhile, I'm not a big believer in the "butterfly effect" where a flap of a butterfly wing in Wisconsin can create a monsoon in Indochina. Sometimes events just don't become significant at all. "Time" has momentum. Now the next phase: remember the backward facing on the train? Well, an infinite number of "pasts" can lead to the current present, and there are an infinite number of universes awaiting us in the future. Infinite past universes; infinite future universes. Now, what if -- what if there is a person who can perceive the near-by universes? This is the premise to the science fiction novel I have floating in my head. Perhaps he can step into the nearby universes as easily as he can step across the room. To those of us still in "our" universe, he would simply disappear. Think of a skyscraper. Sam & Sue are standing the in the NW corner of the middle floor, but suppose Sam climbs the stairs to the next floor up & stands in the NW corner of that higher floor, from Sue's perspective, Sam disappeared. In my story, Sam would only be able to take what he can carry up the stairs, so there is a limit to how much he can bring with him. Now, what are these "nearby universes" like? Some are practically indistinguishable from our current universe, but others might be significantly different. Some of these universes can be more similar to life in our history. One of these universes can be similar to life back in the 1800s or 1500s or biblical times or dinosaur times (or when the Nazi won WWII) -- the choices are infinite. So, in my fantasy, a kind of time travel is possible. May 19 14 08:51 am Link Just a couple of keywords for those who want to look into it. This is called the Many-worlds interpretation and was adapted to resolve certain paradoxes in quantum physics related to wavefunction collapse, and decohesion. But no, the math of the hypothesis clearly states that those different worlds are inaccessible to us in this world. Just like our world is inaccessible to all those other us-es (whatever the plural of the world "us" is) from those countless other worlds. May 19 14 09:43 am Link Paul Bryson Photography wrote: Well, we'll always be in our present. May 19 14 10:00 am Link Just fly from the west coast to the east...done. I like this quote from Total Recall about the concept of time, past and present: Doug Quaid: I want to remember. Matthias: Why? Doug Quaid: So I can be myself, be who I was. Matthias: It is each man's quest to find out who he truly is, but the answer to that lies in the present, not in the past. As it is for all of us. Doug Quaid: But the past tells us who we've become. Matthias: The past is a construct of the mind. It blinds us. It fools us into believing it. But the heart wants to live in the present. Look there. You'll find your answer. May 19 14 10:01 am Link Paolo Diavolo wrote: Travel into the future is possible. We are talking about travel into the past. May 19 14 10:25 am Link Just ten minutes ago, I was just telling my younger self back in 2010 that on May 19 2014 when there is a Model Mayhem Forum question about time-traveling, to make sure that you post that "Time Travel Is Impossible"!  May 19 14 03:04 pm Link Yes. But it's a one way trip. May 19 14 03:18 pm Link |
