Does Time Exist? / Time Travel

[AAngelBunny]

I don't really think anyone would be able to make a man-made time travel machine.
The things haven't happened yet, how can you time travel to the future?
And the things in the past. Will there be 2 of you? And What will happen when you get back? What if your stuck?

[Dogs]

I still find it fascinating that no matter what, you can never remember falling asleep.

[shintenzu]

Originally Posted by Paul

Apparently there is scientific evidence that movement affects the flow of time. How, I'm not sure. But I do know that einstein, and a successor of his both innovated the ideas of time travel. Einstein wrote the golden rule that you can never travel backwards in time, and his successor defied that rule. Both were correct, and both proved their theories correct mathematically. According to what I've heard, Einstein's successor(wish I could remember his name) didn't actually contradict Einstein either, he simply found a way around the golden rule which allows a person to travel backward in time, if conditions are right.

Anyway, I do think time travel is very possible. The experiments I was talking about earlier evidently conclude that if you place a clock in a second story room, and the same one on the first floor of the same building, the one on top will appear to be faster than the one on the bottom. In reality, the two are ticking at the same pace. But due to the earth's rotation, anything that is at a higher altitude is moving faster than something at a lower altitude. Thus, the sped up movement will cause the clock on the second floor to move through time faster than the one on the first floor. Keep in mind though, that this difference in speed affects time so little that the difference would hardly ever be noticable. I have heard of "atomic clocks" however, which tick 9 billion times per second and which, if one was placed at sea level and another on a mountain, would show for sure that the one at the higher altitude ticks faster.

Your evidence only seems to effect the measurement of time and not timeitself. The Clock is really a set of gears rotating at a constant interval, but if altitude effects the speed of the gears, only the clock would have changed and not time itself. Its as if you measure with a leather ruler, but maybe as you go to a colder climate the leather thinks thus everything you measure will measure out to be longer, and then conclude that things you measure in colder areas are larger than things measured in warm areas when the only thiing that changed was yoru measuring instrument.

I think you're separating the two a bit too much. The units of measure directly relate to the passing of actual time. I don't see how the original post in any way confuses the two.

I think Time itself is a man-made concept because with a limited lifespan, you have to measure out durations of events to effectively use the limited amount of existantance you have left on this earth. Time itself cannot be changed because it is a concept, if you take a digital watch that sin good condition and weather resistant, no matter what you do, unless you hack the watch it will always go foward. Traditional clocks are less reliable since the speeds of the gears can be manipulated in specific enviroments.

Time seems to me like the effect of hindsight, you can always remember what you did and in your mind it creates a lapse that seems seperate from your present reality. However I think Time would not be a thought up concept if death did not exist. Even seasons are directly related with the life and eventual death of plants, but if they stayed in bloom as it was always spring and always summer, the sun was always up, I doubt the concept of time would have even been thought up.

Theres alot of evidence against what I say, but the problem with these evidences is that they jump to conclusions way too quickly. For example there was an experiemnt done to prove the relativity of time. Men where sent out of space for an extended period of time, and when they came back they had aged less. The conclusion: time had slowed down for them. However... you have to look at the results and only the results first before you can see the problem with the conclusion: Men were sent out of space, they were put ini suites that gaves these men a highly constrolled body atmosphere to very precise measurements. They were given a specific diet. The air they breathed was 1005 chemically manufactured and pure. Gravity was not weighing down on their bodies. Most astranauts are highly physically fit anyways, and there were not living in a poluted atmosphere eating potentially dangerous bacteria... In fact Everything they used was highly sterilized and the chanced of bacteria in space is 0 apart from anything we bring there.... So is time the only reason their bodies ages less?

[Sociometry]

Interesting..I personally feel it exists though.

[IzumiTaka]

yes you can time travel,

to travel ahead, you need to be on something travelling fast
lets say travelling in the speed of light is possible,
you can travel on this flyingboat and move out of the planet in speed of light
then come back, you will find urself in normal time but the things travelling slower than you gone old or many years been past.

to travel back in time, you need a very very very strong magnetic field.

theories, i forgot, but those are the 2 ways to travel in time.

[slingblader]

Originally Posted by shintenzu

Your evidence only seems to effect the measurement of time and not timeitself. The Clock is really a set of gears rotating at a constant interval, but if altitude effects the speed of the gears, only the clock would have changed and not time itself. Its as if you measure with a leather ruler, but maybe as you go to a colder climate the leather thinks thus everything you measure will measure out to be longer, and then conclude that things you measure in colder areas are larger than things measured in warm areas when the only thiing that changed was yoru measuring instrument.

That's not true. The altitude itself isn't why the clock slowed (but only relatively to the outside! Remember the essential passage of time would have remained the "same" to those inside the "field.") The clock is moving fast, because higher up gives a larger radius, that still rotates at the same interval, thus faster. Because things moving faster pass time less quickly to those outside that accelerated speed, the ticks would be off by some ridiculously small amount. It would hold true to a clock on the bottom of the ocean compared to one at sea level, and to one in a car and one not (except that you could never achieve speeds fast enough to gain any measurable difference, of course).

[Kryptic]

If you fly from East coast USA to West coast.

You arrive before you left.

Time zones are cool.

[Chokichi]

Originally Posted by Kryptic

If you fly from East coast USA to West coast.

You arrive before you left.

Time zones are cool.

thats time zones -_- you actually still spent x hours flying. your not in the past or in future because even if you did get there in a diff time zone and was there before you flew .. you never really went back in time did you? if you flew back your jumping into the future? no people haven't created hover cars yet -_-.

[XxWorfxX]

Yes time exists.

In mathematics we use a forth point to represent the passage of time in an equation, hence the 4th dimension.

No time travel does not exist. Unless someone is going to throw in, "WHERE TIME TRAVELING RIGHT NOW ZOMG!!!"

To travel back in time is an impossibility, common sense would tell you this. Again I'm not talking about YOU slowing down relative to other things. I am talking about the order of causality. To truly travel back in time is to move back to a previous state, to do that the entire Universe would have to move back in unison with you. Since the Universe is every thing in tangible contact, there can be no object to cause the Universe to change its coarse. Unless you believe in a God, then all bets are off.

Traveling forward is impossible too. Again, not things relative to YOU. But the order of causality can NOT be skipped.

TIME IS LINEAR!!! now back to playing Gunz.

[lentan]

ok....
well, first.

Time exists! (i thought ppl knew that)

Time can slow down or speed up relative to other ppl! (meaning your time can pass slower than other ppl's, but to you, you think their time passes faster and you are both right) This is due to time dilation!

You CAN go back in time to kill your father (or grandfather.. or great grandfather...), BUT, you cannot travel back into your own dimension, but instead, you can kill the father of some other you (poor other you) in an alternate dimension!

[slingblader]

Originally Posted by lentan

ok....
well, first.

Time exists! (i thought ppl knew that)

Time can slow down or speed up relative to other ppl! (meaning your time can pass slower than other ppl's, but to you, you think their time passes faster and you are both right) This is due to time dilation!

You CAN go back in time to kill your father (or grandfather.. or great grandfather...), BUT, you cannot travel back into your own dimension, but instead, you can kill the father of some other you (poor other you) in an alternate dimension!

That's highly speculative, as it's based of a theory. Plus, I've always found it doesn't make a lot of sense. What laws that bind you to time here suddenly no longer apply in alternate realities, where those same laws apply to the members of that reality and say THEY can't do what we can't do except we can if we do it to them. Plus, the idea of infinite realities would include the factors that time travel is impossible, and therefore that idea is null based on the theory it's based on.

[An Amateur]

I nearly gave up on the first post. Very confusing, too many "..." etc.

It's interesting how different people have approached this. Some people are confusing what time is though.

Time essentially has too meanings. We perceive the universe as a succession of events, causes and effects, this is time as the fourth dimension. Essentially that is what time is. However time itself can also be measured, usualy in seconds, minutes, hours, days, weeks, months, years etc. We commonly also reffer to this as time also.

Time itself is the 4th dimension. Time is not a measurement, however we have measurements of time. This is a realist perspective in which time evidently exists.

We could look at an extreme rationalist perspective by contrast. By that I mean that we cannot be sure of anything except that "I think therefore I am" (althought WHAT I am is uncertain). From this perspective we would then say that I percieve that there is an external world with events that follow in sequence but that could be the construct of my own mind in order for me to better understand the supposed external world. In other words everything actually happens in no particular order, yet we string things together in sequences in order for us to percieve things in a way we understand.

[Paul]

Originally Posted by shintenzu

Your evidence only seems to effect the measurement of time and not timeitself. The Clock is really a set of gears rotating at a constant interval, but if altitude effects the speed of the gears, only the clock would have changed and not time itself. Its as if you measure with a leather ruler, but maybe as you go to a colder climate the leather thinks thus everything you measure will measure out to be longer, and then conclude that things you measure in colder areas are larger than things measured in warm areas when the only thiing that changed was yoru measuring instrument.

As Slingblader said, you're really misunderstanding the reason that altitude affects the clock.

And my evidence does not affect time at all, you're right. Why would it? What it does is it shows how time works.

Originally Posted by shintenzu

I think Time itself is a man-made concept because with a limited lifespan, you have to measure out durations of events to effectively use the limited amount of existantance you have left on this earth. Time itself cannot be changed because it is a concept, if you take a digital watch that sin good condition and weather resistant, no matter what you do, unless you hack the watch it will always go foward. Traditional clocks are less reliable since the speeds of the gears can be manipulated in specific enviroments.

Time seems to me like the effect of hindsight, you can always remember what you did and in your mind it creates a lapse that seems seperate from your present reality. However I think Time would not be a thought up concept if death did not exist. Even seasons are directly related with the life and eventual death of plants, but if they stayed in bloom as it was always spring and always summer, the sun was always up, I doubt the concept of time would have even been thought up.

I disagree completely. Time would most definitely be a concept if it weren't for these things, it simply wouldn't be as big a deal. If there was no time limit on life, we wouldn't be as concerned about it as we are. But we would still need something to call the passing of things, and thus we would invent the word time. However, we only invented the word. To say we invented time is to say that time never existed to begin with. Not the word, but the concept. And that in itself is ridiculous.

Originally Posted by shintenzu

Theres alot of evidence against what I say, but the problem with these evidences is that they jump to conclusions way too quickly. For example there was an experiemnt done to prove the relativity of time. Men where sent out of space for an extended period of time, and when they came back they had aged less. The conclusion: time had slowed down for them. However... you have to look at the results and only the results first before you can see the problem with the conclusion: Men were sent out of space, they were put ini suites that gaves these men a highly constrolled body atmosphere to very precise measurements. They were given a specific diet. The air they breathed was 1005 chemically manufactured and pure. Gravity was not weighing down on their bodies. Most astranauts are highly physically fit anyways, and there were not living in a poluted atmosphere eating potentially dangerous bacteria... In fact Everything they used was highly sterilized and the chanced of bacteria in space is 0 apart from anything we bring there.... So is time the only reason their bodies ages less?

No offense man, but if we're talking about a group of scientists that are researching time itself, I think they'd have looked into it much more thoroughly than you are. I mean, you may have your opinions and all but why doubt the evidence? These guys are smart enough to calculate all the necessary numbers to launch a space craft to the moon(please no-one start on the conspiracy theories), which takes into account the revolution and rotation of not only the earth but the moon itself, amongst other things. They're pretty good at picking out variables. And really, the people in that space craft didn't age much less at all. They weren't going nearly fast enough to go very far. I think it was like two seconds, and even that might be high. I can't remember the exact number, but it could have been under a second even. But even with that evidence, there's certainly enough to tell you that time is affected by movement.

[arcanox]

My theory is that time doesn't exist. It's just a name used to identify the sun going up and down. IE. the sun going up and down 7times-"week" It''s just that people refer the word "time" as to how far the sun will come and go

[Bartender]

Originally Posted by shintenzu

Theres alot of evidence against what I say, but the problem with these evidences is that they jump to conclusions way too quickly. For example there was an experiemnt done to prove the relativity of time. Men where sent out of space for an extended period of time, and when they came back they had aged less. The conclusion: time had slowed down for them. However... you have to look at the results and only the results first before you can see the problem with the conclusion: Men were sent out of space, they were put ini suites that gaves these men a highly constrolled body atmosphere to very precise measurements. They were given a specific diet. The air they breathed was 1005 chemically manufactured and pure. Gravity was not weighing down on their bodies. Most astranauts are highly physically fit anyways, and there were not living in a poluted atmosphere eating potentially dangerous bacteria... In fact Everything they used was highly sterilized and the chanced of bacteria in space is 0 apart from anything we bring there.... So is time the only reason their bodies ages less?

Time isn't the reason why people age, it is things that happen during time that makes people age.

@Paul, the russian guy is only a very small fraction of a second ahead in time, and this is only theoretically. He had to orbit for quite a while.