Scratch

No, due to the grandfather effect.

When you go back in time, you could kill your own grandfather before your parents were born, thus preventing your birth, but if you aren't born you won't go back and kill him, so he will live, so you will be born, but then you can go back and kill him, etc.

Last edited by Kileymeister (2010-11-17 21:09:02)

But, the past has already happened. If you read the Sun Babelfish blog's post on Dimensions, you could just as easily travel into one of the dimensions and go either into the past as you could time travel. You could go into a possible past, or into a possible future.

3. Alternate timelines. In this version of time travel, there are multiple coexisting alternate histories, so that when the traveler goes back in time, she ends up in a new timeline where historical events can differ from the timeline she came from, but her original timeline does not cease to exist (this means the grandfather paradox can be avoided since even if the time traveler's grandfather is killed at a young age in the new timeline, he still survived to have children in the original timeline, so there is still a causal explanation for the traveler's existence). Time travel may actually create a new timeline that diverges from the original timeline at the moment the time traveler appears in the past, or the traveler may arrive in an already existing parallel universe (though unless the parallel universe's history was identical to the time traveler's history up until the point where the time traveler appeared, it is questionable whether the latter version qualifies as 'time travel').

        James P. Hogan's The Proteus Operation fully explains parallel universe time travel in chapter 20 where it has Einstein explaining that all the outcomes already exist and all time travel does is change which already existing branch you will experience.

        Though Star Trek has a long tradition of using the 2.1 mechanic, as seen in "City on the Edge of Forever", "Tomorrow is Yesterday", "Time and Again", "Future's End", "Before and After", "Endgame" and as late as Enterprise's Temporal Cold War, "Parallels" had an example of what Data called "quantum realities." His exact words on the matter were "But there is a theory in quantum physics that all possibilities that can happen do happen in alternate quantum realities," suggesting the writers were thinking of the many-worlds interpretation of quantum mechanics.

        Michael Crichton's novel Timeline takes the approach that all time travel really is travel to an already existing parallel universe where time passes at a slower rate than our own but actions in any of these parallel universes may have already occurred in our past. It is unclear from the novel if any sizable change in events of these parallel universe can be made.

        In the Homeline setting of GURPS Infinite Worlds there are echos — parallel universes at an early part of Homeline's history but changes to their history do not affect Homeline's history. However tampering with their history can cause them to shift quanta making access harder if not impossible.

        A type of story which could be placed in this category is one where the alternative version of the past lies not in some other dimension, but simply at a distant location in space or a future period of time that replicates conditions in the traveler's past. For example, in a Futurama episode called The Late Philip J. Fry, the professor designed a forward-only time travel device. Trapped in the future, he and two colleagues travel forward all the way to the end of the universe, at which point they witness a new Big Bang which gives rise to a new universe whose history mirrors their own history. Then they continue to go forward until they reach the exact time of their initial departure. Although this journey is not exactly a backward time travel, the final result is the same.

        In the Japanese manga, Dragon Ball, the character Trunks travels back in time to warn the characters of their deaths soon to come. This does not change his time line, only creates a new one in which they do not die. Soon two of the characters destroy the lab where the monster Cell is being created, stopping him from absorbing the androids, creating a third time line. Later it is revealed that Trunks is killed by Cell in the future, then travels to three years before any of the events occurs, which creates a fourth time line. No matter what any character does in the past, their own original time line is unchanged.

Quoted from an article on time travel.

In short: Yes. Definately. In what form I am not sure of. I have several things a day that continue to prove it (to me, anyway). That, or Parallel Universes exist.

Harakou wrote:

Good luck building an energy source that big. Your best bet would be to get near an extremely strong source of gravity (ie: a black hole), thus slowing down your personal time within the plane of space-time. Time for everything else around you would go faster, thus, you would arrive sometime in the future, having aged slower than everything else. Of course, the problem with this is that you couldn't get back. 

But since physics are probably inverted inside a black hole, a white hole would exist on the other side of the singularity.
If you somehow got to the singularity, then you would be stretched in every direction.

Also, how do we know anything exists?

Here is my theory on how the universe should not exist.
Something should have created the universe.
But something would have to create that.
Thus, something would also have to create that.
And so on.

But what if we're inside a black hole? A... Schwartzenchild black hole... no, a Schwarzschild black hole!

It turns, which means that gravity, and orbits, can exist.

Harakou wrote:

Good luck building an energy source that big.

dude just get a flux capacitor or something like that

also i heard theres this theory which makes the whole grandfather thing possible

pretty much theres points in the linear motion of time on which we travel where the line splits
pretty much there is a place in time for every possible way everything could happen
so the time we ride (4th dimension) is like out 1st dimension and all this jazz (5th dimension) is like the 2nd dimension

then if you bend the next dimension you get to travel really quickly between points in possible time

in other words read flatland

I hope not.

So you would need to get to the speed of light to be in the future—that means you need to create something that will go that fast.

Well, there is a thing that is probabley the closest to time-traveling.

The Barmuda( however you spell it XD) Triangle. One side is a timeline. The other side is a different timeline. On one side it's 10pm on Thursday and on the other side it's 10pm on Friday(using that time).  So you are sort of time traveling. Bleh. 

Last edited by brinkbrink (2010-11-17 23:18:44)

brinkbrink wrote:

Well, there is a thing that is probabley the closest to time-traveling.

The Barmuda( however you spell it XD) Triangle. One side is a timeline. The other side is a different timeline. On one side it's 10pm on Thursday and on the other side it's 10pm on Friday(using that time).  So you are sort of time traveling. Bleh. 

Aw, that doesn't count. 

Chrischb wrote:

I say it's possible, we're going forwards all the time 

How?

hdarken wrote:

Chrischb wrote:

I say it's possible, we're going forwards all the time 

How?

were traveling through time at a relative rate of one second to one second

pretty much that means we are experiencing time at all