Try looking up at the stars at night, the light from the stars is approximately 400 years old.

That's effectively looking into the past! ;)

agentbutters wrote If time travel was possible, could someone in the future travel back in time to for example, to tell us of something that will wipe out the human race?

No this would not be possible, as I have explained before.

Doing this would create a paradox.

If for example, we developed time travel tomorrow. And the first idea someone had would be to go back in time, and kill Hitler (it would actually be impossible for us to go back to this time with a time machine we just created, but nevermind that).

So someone goes back in time and kills Hitler before he starts the holocaust. This therefore changes the future, to a point where the holocaust does not happen. As the holocaust didn't happen, people would not view Hitler in the same way, and so when the time came round for when we first created the time machine, nobody would have an intention of killing Hitler, as he was not responsible for the death of 6 million Jews, as well as other minority groups. Therefore no one will go back in time to kill Hitler, and therefore the holocaust happens again!

Time travel is confusing stuff.

I believe we will, but we will be dead by the time someone figures it out. I don't think time travel would be safe tbh.

Euler wrote

agentbutters wrote If time travel was possible, could someone in the future travel back in time to for example, to tell us of something that will wipe out the human race?

No this would not be possible, as I have explained before.

Doing this would create a paradox.

If for example, we developed time travel tomorrow. And the first idea someone had would be to go back in time, and kill Hitler (it would actually be impossible for us to go back to this time with a time machine we just created, but nevermind that).

So someone goes back in time and kills Hitler before he starts the holocaust. This therefore changes the future, to a point where the holocaust does not happen. As the holocaust didn't happen, people would not view Hitler in the same way, and so when the time came round for when we first created the time machine, nobody would have an intention of killing Hitler, as he was not responsible for the death of 6 million Jews, as well as other minority groups. Therefore no one will go back in time to kill Hitler, and therefore the holocaust happens again!

Time travel is confusing stuff.

Aye!

But what if someone went back in time and aided Hitler for a specific reason

People might have time traveled without any of us knowing because it was all done before we ever thought about it?

It's a paradox but it doesn't mean it can't ever happen

A paradox in time might've already happened...

I have a feeling it will be a long time before we can use time travel.

-3D wrote

Awesome_Pineapple wrote If you could somehow see the Earth, the year would still be 2012, because the events that have happened on Earth in the time after can't be seen yet because the light hasn't travelled to the place where you are in the universe.

Now, you say that the events after that haven't happened because the light hasn't travelled there yet. But do we actually need light for events in time to happen? Because all light is is, well light. If there is no light (A pitch black room for example) things can still happen. So how does your/Einstein's theory correct about that part?


But the whole post is very interesting. I mean, I doubt that we will ever, ever travel anywhere near the speed of light! I mean, think about it. Imagine travelling at 299 792 458 M/S! That's 670618296 MPH! We would probably die due to the immense amount of G-force on us!

No, no. The events happened two years ago in real-time but the way someone 2 lightyears away sees them is that they are just happening. It's hard to understand let alone explain. Let me use an analogy. Let's say there is a small cloud raining over a city 2 miles away. It's raining on that city but not in your city. Once the cloud travels two miles to your city, it is raining. Light is what projects images as well. It travels and cannot project things immediately, so if you are 2 lightyears away there's some "video lag". Sorry if I messed that up for you, don't fell stupid for not understanding it, because I'm awful at teaching things.

Groovy wrote

Euler wrote

agentbutters wrote If time travel was possible, could someone in the future travel back in time to for example, to tell us of something that will wipe out the human race?

No this would not be possible, as I have explained before.

Doing this would create a paradox.

If for example, we developed time travel tomorrow. And the first idea someone had would be to go back in time, and kill Hitler (it would actually be impossible for us to go back to this time with a time machine we just created, but nevermind that).

So someone goes back in time and kills Hitler before he starts the holocaust. This therefore changes the future, to a point where the holocaust does not happen. As the holocaust didn't happen, people would not view Hitler in the same way, and so when the time came round for when we first created the time machine, nobody would have an intention of killing Hitler, as he was not responsible for the death of 6 million Jews, as well as other minority groups. Therefore no one will go back in time to kill Hitler, and therefore the holocaust happens again!

Time travel is confusing stuff.

Aye!

But what if someone went back in time and aided Hitler for a specific reason

People might have time traveled without any of us knowing because it was all done before we ever thought about it?

It's a paradox but it doesn't mean it can't ever happen

A paradox in time might've already happened...

No. Fictional Time Travel that includes the disruption of events is impossible sadly. We can only SEE past events from a distance. It would be so cool if we could go back in time a FEEL what it's like. But that isn't possible I guess. Maybe we will find a way. For now it's believed to be impossible though. There are alot of things in science that make 0 sense anyways :p

I think it will be possible and i think it will be in the next 50-100 years , if you look 50 years back till now you will realise how far we have progressed in technology.

If time travel is possible, could it be that our world is just a part of many other worlds?

For example, let's say our world is "World One." If someone from "World Two" were to come and do something to change the past of "World One", "World One" would stay the same and the altered "World One" would create a new world called "World Three"
= Different worlds have different pasts, present, and futures? =

Considering time travel, I thought time was just a way of organizing?

Considering the traveling at the speed of light, wouldn't we have to figure out some way of being completely annihilated while traveling at this speed?

I think you have overlooked the entire concept of relativity. If you consider the equation e=mc^2, it clearly states that as an object nears the speed of light its mass incrementally increases. So if you then involve f=ma you can surely see that to reach the speed of light alone requires "mathematically" an infinite supply of energy. So, to exceed this is simply not possible; Light travels travels at its such speeds because of its properties as waves/photons, they simply don't have mass.

Basically you can ponder what you want but, it's not only impossible during our lifetimes but will remain that way forever more.

There is more I could argue with but, I don't want to drag this on. Einsteins theory of relativity is not a hoax.