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COMMENTS:
Then everybody would do that sh1t. Only a select few would have the right.
by _jr_ on Sun Feb 15, 04 7:00pm
[+]
If time travel would ever be possible, wouldn't you think that someone would have seen a time machine by now?
Oh yeh, and taken to its absurd conclusion you would be able to go back and shake hands with yourself as a child which would mean there could be an unlimited number of you on the same planet at the same time. Not good for global warming me thinks!
Another example: don't like the course of history? Think the Nazis were just a bunch of misunderstood choir boys? Well what would be wrong with going back and delivering them the technology for the atom bomb? Kaboom Kabaam!! World war two to the Krauts! 'Cept of course them Nazi boys were then too power hungry for their own good; ten years later the whole world is consumed in a nuclear holocaust and the present for the guy who went back now doesn't exist, so he can't go back and do it...oh my! I strongly suspect the future and the past both exist but it is certainly impossible to travel in either direction.
I know who actually shot jfk, who deepthroat was, who wrote the book of love, what ronald reagans last coherent thought was, and who really won the 2000 presidential election!
But don't start any shit about that senate race where i lost to a dead man or i'll come to your house and steal all your pot. i'm not kidding.
Time is on a loop with each point in the future/past fixed at a set point on the clock face. Everything is predestined and free will does not exist. Does this make you feel a little sad?? Irrespective of what you think you are doing, it is all outwith your control. But where does that leave the law I hear you cry? Surely we have the right to judge? Nope! We are now moving into an age where the law will disappear and we will do what makes us happy. Yippee!! An age where inhibitions and repressions are released and selfishness is no longer a dirty word. Que sera sera...the future's not ours to see...whatever will be will be...que sera sera.
Time travel is a great and never-ending question, of course, bringing with it the famous (or not so famous)paradox: A guy is depressed, and wishes that he was never born. So he goes back in time and kills his grandfather. He comes back , and it's just as it was before he killed him.
Why?
Two Answers: 1) the "consistant histories approach". even if space-time is warped so that it would be possible to travel into the past, what happens in space-time must be consistent with the laws of physics. According to this, you could not go back in time unless history showed that you had already arrived in the past and had not killed your grandfather while being there. Moreover, you wouldn't be able to change recorded history - no free will.(Humans have free will because we can't predict what they''l do) For example, if a man goes off in a rocket ship and comes back before he set off, we will be able to predict what he will do because it will be a part of recorded history.
2) the "alternate histories hypothesis". when time-travelers go back in time, they enter alternate histories which differ from recorded history. because each thing you do in life could have been done differently, with different consequences to each side. So, you could kill your grandfather over and over, but that's not recorded history, that's the alternate universe that was created by you, and it will not affect our universe, nor change its records.
No
by Stephen Hawking on Feb 15, 2004
Ditto!
"self-proclaimed genius violinmeister8x?"
I beg your pardon. Number one, I never said I'm a genius.
Number two, forget me. It's Hawking you've got to challenge. Number three, I think you should look at what question we're debating about, and I think you'll come to the conclusion that YOUR post is the childish one. And lastly, what could I possibly know about physics? Not much. But I do know that I've spent the better part of my 15-year-old life researching its properties.
Regards.
My post constituted an approach to going BACK in time, as you may see. That's what I meant when I wrote "look at what question we're debating about". I meant regarding the specific travelling one that I brought up. If it was ambiguous then I apologize.
This poll question actually seems to have two questions:
#1) Is space-time asynchrony (i.e., time travel) possible?
#2)Can the events occuring outside of one's original space-time reference be altered?
Answer to question #1: I would say YES. I have read that on a quantum level,the space-time laws observed in the macroscopic universe, do not appear to be the same laws observed in the quantum universe (e.g., quantum particles appear to exhibit characteristics associated with time travel). Of course, we now have to figure out how to make large matter behave the same way as quantum matter does in order to be able to travel backward and forward in time.
#2)This is the more philosophical aspect to the question: If time travel were possible, how come people from the future have not come back to visit us, or altered the events of the past in some way?
A few answers:
1) They are not interested in us (because the future human race is so advanced that we probably seem like amoebas to them
2)Time travel is not possible
3)Even though time travel is possible, time travellers are limited by some undiscovered physical law (established by God) which states that you can travel backwards and forwards through time and observe events, but you cannot PHYSICALLY alter the events. I would call this the "Scrooge" principle, based on the fact that when the ghost of christmas past and future took Scrooge backwards and forwards in time, he could only observe himself and not alter what was happening. Also, note that although Scrooge went backward and forward in time, no one in the space-time frame that he went too could see him. Perhaps, if you wanted to express the Scrooge principle in physics babble, you could say that there may be some sort of space-time decoupling during time travel, in which we can travel through our time, but there will always be spatial asynchrony.
4)Perhaps our understanding of how time travellers would visit us is limited. What if time travel is a psychological/brain phenomenon? Could that explain some people's claims to be able to see events that happened in the past and future?
5) There is no future human civilization--we have eliminated ourselves in some catastrophic world war
Did you know?
our govenment is currently at work building a time machine.true story.i saw it on the learning channel.the guy building it is really wierd.he claims as soon as its built he will open it up only to find stuff already in there from the future.crazy stuff man!
The ENTIRETY of Hawking's argument against time travel is this- "If time travel IS possible, then WHY haven't people from the future come around to INTRODUCE themselves?". A valid point, for all of six seconds.
A thought exercise, for those of you interested out there. Go to your local shopping center, stop the first person you don't know, and say "Hi! I'm a time-traveler from the year 3017, and I'd like to know hwere the places of scenic interest are."
I'll be by in about a day or so to spring you from your friendly local nuthouse...
The universe is an infinitely big place. Our universe and all the near infinite parallel universes encompassing all scenarios and exist all within the same space separated only by varying frequencies at which they modulate at. Not only do we flow into the future at a set rate of time(moving 4-d), but we also are constantly skewing off into new universes or moving 5-d as well. If you could view our histories timeline into the past and future there would be a set point for this exact moment in time and all kinds of lines skewing off into the future. The past would look pretty much the same. When you travel forward or backward in time you are actually traveling 5-d to alternate universes that may look as they should or be totally different based on how far you travel. The infinite universes are such a big place that it would be rare for a time traveler to actually end up in our universe and then to make themselves known. They would know that making changes to the past would make it very hard if not impossible to return home to the universe they knew. Even if they wanted to make their future better it would be near impossible to do that by changing one or even many things. The calculations would be too complicated even for a future supercomputer because of all the random unknowns that can occur and that effect everything else like a random domino effect. There is the chance that the Revelations of the Bible are true in which case this all comes to an end sometime within this century and we won't get to keep exploring the universe and inventing new things like time travel. In addition, at some point in the future their could be a disaster that destroys mankind before time travel is created. These are some reasons why we have seen no time travelers especially if they could not bring back physical proof so as not to be labeled a nut case.
If we exist long enough time travel will be possible by future space ships that will travel near the speed of light allowing them to move into the future much faster than they normally would. Later on advanced ships will find a way to traverse hyperspace allowing them not to be restricted by the laws of space-time and to travel at faster than light speeds into the past. A personal time machine might allow an individual to travel through time by altering their body and transporters energy wave speeds and frequencies.
You can go forward in time if you travel faster than the speed of light. But you can't go backwards in time. So basically it is possible, but you can't go back afterwards. I think if you want to go backwards you need to travel even faster than if you want to go forwards, but it is impossible for some reason.
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