That is the great question of time travel, isn't it?

There are four possibilities:

1. Immutable Timeline: There is no "changing" the past because there's only one timeline and whatever you go back and "change" has already been done, a part of our current history.

2. Single Timeline: If you go back and change something, you instantly change the future. If it's something like killing your grandfather, then FOOP! You instantly vanish the moment his death becomes certain (whether that's when the bullet is fired, or when he dies, I'm not sure).

3. Multiple Timelines: You go back and change something, such as killing your grandfather, but instead of vanishing, you continue on, in an alternative timeline that's just branched off from the previous one.

4. Time Travel Not Possible: Self-explanatory.

One of the best stories I've ever read on timelines is By His Bootstraps by Robert A. Heinlein. Very interesting read!

That is the great question of time travel, isn't it?

There are four possibilities:

1. Immutable Timeline: There is no "changing" the past because there's only one timeline and whatever you go back and "change" has already been done, a part of our current history.

2. Single Timeline: If you go back and change something, you instantly change the future. If it's something like killing your grandfather, then FOOP! You instantly vanish the moment his death becomes certain (whether that's when the bullet is fired, or when he dies, I'm not sure).

3. Multiple Timelines: You go back and change something, such as killing your grandfather, but instead of vanishing, you continue on, in an alternative timeline that's just branched off from the previous one.

4. Time Travel Not Possible: Self-explanatory.

One of the best stories I've ever read on timelines is By His Bootstraps by Robert A. Heinlein. Very interesting read!

That is the great question of time travel, isn't it?

There are four possibilities:

1. Immutable Timeline: There is no "changing" the past because there's only one timeline and whatever you go back and "change" has already been done, a part of our current history.

2. Single Timeline: If you go back and change something, you instantly change the future. If it's something like killing your grandfather, then FOOP! You instantly vanish the moment his death becomes certain (whether that's when the bullet is fired, or when he dies, I'm not sure).

3. Multiple Timelines: You go back and change something, such as killing your grandfather, but instead of vanishing, you continue on, in an alternative timeline that's just branched off from the previous one.

4. Time Travel Not Possible: Self-explanatory.

One of the best stories I've ever read on timelines is By His Bootstraps by Robert A. Heinlein. Very interesting read!

I think we all got your point the first time around!

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The problem there is the conditions outlined in the OP were that one could either go forward or backward, not both.

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I have absolutely no idea why that posted three times!

Strange...

Could it have been you in three different timelines?

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Yes, they laughed at Einstein, but only because of his silly hairstyle; no one was actually laughing at his science.

You guys crack me up sometimes.

I just love it!

I know, Candy. I went back in time and implanted a chip into your head when you were baby, so that when you would read the posts on time travel here, you'd find them really funny. What you do not actually know is that you've been brainwashed to find them funny.

The same goes with anyone who at least cracked a smile at this thread. I was a busy little boy.

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"A long habit of not thinking a thing wrong gives it a superficial appearance of being right." -- Thomas Paine

Being intelligent is not a felony. But most societies evaluate it as at least a misdemeanor. -- Heinlein

Creationists make it sound as though a "theory" is something you dreamt up after being drunk all night. -- Isaac Asimov

arrrg! this scar on my forehead itches!

Maskutov - I think he meant that it would be good to take knowledge back from today to assist scientists of yesteryear. Financially rewardinig and all that.

SOmething like go into the future get the formula for a posible AIDS cure and bring it back to ourtime...

... so confusing if you do since who invetend the cure then? since it would exists in ourtime and there was no need to invent it... but then who invetend it in the first place... My head hurts and i haven't even left my time

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GCS/S d(+) s+:+ a--- C++(+++)>$ W+++>$ L>+ M+>++ w++ P+>++ tv@ PS b+ DI+ G e-> h! r-- !z+

~Jorge Schrauwen

I remember you posted that tomorrow.

How do you know he DIDN'T invent transparent aluminum?

Yes. This is what I meant.

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Who are you who are so wise in the ways of science?