this topic is more of a "spout-off-what-you-know-or-want-or-whatever" instead of "full-out-discussion", so yeah....

pop out whatever you want. the science of it, the coolness of it. whatever. spout off something, then we can talk about it, spout off something different, repeat process.

i guess i'll start. um, invention of time travel. if someone has invented time travel in the future, why haven't they visited us yet? ( i have my own answer but am really uber tired right now so i can't answer it.)

BEGIN!

P.S. there is a reason I posted this in spam haven mods. don't erase it, please. it ain't hurting anybody.

yeah, time travel is really confusing with multiple hypotheses.

The most common time traveling things I see in Sci fi are:

1. you can't change the future no matter what you do in the past. The history is already preordain and you're pretty much stuck with the world you got. So fiddling with the past isn't going to do anything.

2. Changing the past changes the future. So if you go back into the past, you're affecting the past so that you'll never arrive at the same past you left.

Perhaps you've seen the recent Stephen Hawking news that time travel should be possible, in theory at least

negative energy density? Like dark matter? Oo? *googles it*

iz confuzzled

Okay, if everything on earth was static/never changed, time wouldn’t exist. Time is something that was created for people to experience/go through it.

Time travel: Going back in time, and then forth isn’t simple and it’ll take brains and brains to actually get it happening.

Hm, Stephen Hawking has such a positive attitude toward things :p
Oh wow, the physicist is an atheist, no wonder xD


@KTC, He also said people's “views” might not be correct. Maybe he was in a goldfish bowl when he stated that, about some negative energy required etc.

Ahh yes, time travel. the most dangerous thing on earth!

As for one thing: Paradox!
Ashen described it very well. The time would stop completely! Life would end!

And also, changing a simple thing, like removing a piece of trash.
The piece of trash could make a robber prevent from escaping with a ruby that was meant for a gift for a woman from a man, removing it could prevent them for falling in love and that could either make a paradox, or make your best friend not exist. If your best friend/you were descended from the pair who the ruby story made.

Simple to think basic: Time Travel.
Yet when you think closer: Danger.


Thats my opinion.

Time travel IMO is impossible. 2000 years and we have made progress in everything we tried but are still unable to time travel. And it wont happen because if it did we would see someone from the future everyday.

Good point theone (IIIP

@theone: not necessarily. time travel could be heavily guarded in the future which would make time traveling next to impossible to do for the common man. It would be like trying to break into Fort Knox.

And for people who do time travel, they could have been taught how to behave, what to dress in, how to be discrete, etc. for any time period. So you wouldn't know a future traveler even if they bumped into you.

As for that 2000 years ago: 2000 years ago, if you mentioned 'internet' or 'guns' or any type of modern equipment, they'd laugh at you and think you were a crazy person. Just because we haven't done it yet, doesn't mean we won't do it ever.

@matrimat: that works only under the assumption that if you change the past you change the future. There's several hypotheses contrary to this in that they state you cannot change the future. History is already set in stone so anything you do in the past has no effect on the future.

We obviously don't know which is correct lol.

The history is set in stone yes, but you can change what will be put there.

If you flew back and killed Jesus(Not saying he ever existed), there would be no bible, or at least another story.

And if you killed Hitler as a baby, there would have been no second world war.

What i mean is, that what is wrote down now, takes roots in what has happened.

Wrong matri. There would still be a power crazed dictator.What no one notices though is that Hitler was an outstanding adminstrator and the fact he got Britain and France's permission to build up and army is nothing short of brilliance( But this is off topic) . He was not the only one who hated the treaty of Versailles. If the treaty had been more lenient there would not have been WW2. Mussoloni could have built up power in Italy and Japan already was going to attack so no one could have stopped the war by killing Hitler

You are right, noone but hitler could stop the war by killing hitler
Anyways, maybe there would have been a 2nd world war. but there would be no books full of: Hitler started the 2nd world war.

My point is, that by changing the past the future change as well. It would just change to if it has been like that always, wich would result in your mind missing parts and stuff.

Anything you do to change the past will make a paradox... so yeah...

@matrimat: you're entirely misunderstanding what I said.

You're still under the assumption that history can be changed.

My point is that there are alternative theories where it states history cannot, under any circumstances, be changed. Everything will happen exactly as they were, precisely.

For example, in one outer limit episode, the good guys were successful in eliminating Hitler as a baby. What they didn't expect was Hitler's father finding a baby and taking him in as a hitler replacement. And than history went exactly as it was if it was the real hitler.

Another example is a man went back in time to stop a murder. What he didn't know was, he is the killer. And history continued as it did before.

Still, more examples would be greek stories where there is often a prophecy that the king tries to avert. However, the joke is on him since he played right into the Fates' prophecy and carried it out into completion.

See where I'm going with this?

Yeah, i do see what you mean. But I personally think you are wrong.
The only reason for the history not to change will be paradox, which occur everytime you change just a little in the past.
What you are talking about don't really make sense, Since you could just kill Hitlers father mother and everyone in Hitlers family. paradox do make sense however: If you killed Hitler, there would have been no Hitler, so you couldn't kill him, so there was a Hitler so you could kill him.

See?

@matrimat: it's not something I personally believe in. I haven't given time travel much thought as sci fi stuff generally doesn't interest me.

It's simply an alternative theory on how time travel would work.

hitler: than someone will simply replace him as hitler or more a simple solution: that time traveler will meet an unfortunate end before he carry out his mission. That's the thing about this model. Anything you do will always be compensated in some way so that history is the same.

You're screwed regardless of what you actually do.

Also, this model presumes that history is a manipulative entity, much like the Fates for greek. Everything is already predetermined so chances are, your trip back to the past will have already been anticipated and compensated for.

I point back to that story about the man going back in the past to prevent a murder only to find out that he was the killer, which was the catalyst to make him build a time machine in the first place.

History anticipated his actions, or rather, it manipulated the situation enough that he was merely a puppet going through the motions.

You're model assumes that you can control history. The alternative is that history/fate/etc. controls you... you just don't know it.

slightly off topic:
One of my favorite games quotes, 'history abhors paradox' and it was only under extreme circumstances (for how a soul devour your own soul?) could one break the hold the fate had on the main character.

But! Even though he was the only one with true free will (as in the fates/history couldn't control him), his actions lead exactly to the same events that doomed him in the first place. A bit ironic.

Actually, let's just presume you changed history.
You killed Hitler and there was no War. But the thing is that thing will keep on happening at the time and in the end you are left with one version of history that is no war. So let's just say someone wanted WW2, he installed Hitler but that will now keep on happening. Unchangeable

Yeah, even though time travelling will NEVER be possible! Or at least not safe. Everything you do will cause paradox! or almost....

people claimed it will never be possible to save lives by cutting people open and operating on them.

they've been saying its impossible that the earth isn't the center of the world.

they've been saying its impossible to reach the moon.

heck, they've been saying its impossible to survive past 1000,2000, 2012, 2013, 1800, etc. etc.

people have and will be proven wrong many times over. maybe this will be one of those times in the distant future.


(also paradoxes only work under your model. in the model I present, paradoxes are handled swiftly and without mercy. hence they will most likely not be a problem.)

@ KTC- Do you mean you could only see the time of the previous period with no interaction