Geek Out!: Stephen Hawking and five ways to travel in time

On a serious note. I contend that the abaility to travel back in time will never occur. The reasosn is that if that abaility was to ever exist, 'Wouldn't we already have seen evidence of it?'

Are you telling me that nobody from the future with the power to go back in time wouldn't have come back and stopped Hitler, the holocaust, the assassination of Martin Luther King or John F. Kennedy, or even prevented 911?

if traveling back in time would ever be possible in the future, then we would already know it!

O.K. Scholars, your retortes!

If I went back in time and killed my dad before I was born, then how can I ever be born? And if I can't be born, then how can I go back in time to kill my dad.

People, time travel is nothing more than fantasy. It's NOT possible. It's like the Special Olympics...if if you win (this argument), you're still a retard.

The example of going back in time and killing your dad (mom, self...) is not proof you cannot go back in time. Its just proof that you cannot go back in time and kill your dad. You can go back in time, but be unsuccessful in the killing. Maybe you get hit by a bus or the gun misfires. Even for non-time travelers, killing someone is not a sure thing.

Two thoughts on the conservation law of matter/energy.

First, this is just a theory, not a “law”. The way you are looking at it may be too limited. If time and space are really connected, then maybe the conservation law of matter/energy involves all of time and space and not just this moment of time and space.

Second, it took energy to send the bar of lead into the past. Therefore, new matter was not created, just converted from energy to matter. The matter was just created in another time.

Doctor Who got me thinking about his theory on time travel. The lead block idea of a piece of mass traveling back in time tho that piece would already be there. So what if Time travel would just be time viewing. What if you even did travel back in time it would just be the images not neccessarily the matter? What if?? What if??

I think the most challenging aspect of travelling to the future is a point of reference for locality. With the universe expanding, how do you plot your physical point of arrival? If you simply travel in time and not simultaneously in physical space, the location of your launch is not at the same physical spot at the time of your arrival. Wouldn't you have to first travel out into space, then travel in time, then determine your physical location of arrival, then travel to your desired location of arrival?

Maybe that was actually me who crashed in Roswell? My time machine worked, but my spacecraft didn't!

Who came up with the idea that time is a dimension? I remember HG Wells writing that in the Time Machine novel. If time and space are the same than time should be targeted by the space occupied at a certain time. The thought of moving to a certain point in space for a certain date of the past is an interesting thought but also rememder that the universe is also expanding at light speed or so they say. If I consider empty space as inert and the only mass within it is the universe then the only action taking place are the actions of other bodies within that inert nothing nott the actual space. All of those actions would cause various eddys and currents on the matter within that space making it extremely hard to plot a course to a specific set of corordinates

I think the problem here is that we want to view Time like we do Space.. we can travel thru Space by movement.. we perceive objects moving in space and think we can do the same with Time... but Time is not Space.
Time is the name we give for something we cannot quite truly understand.. we see the effects of motion within it, but we dont really SEE it.
The only thing that exists in regards to Time is NOW.. there is nothing to go "back" to because it doesnt exist.. what was then exists only now..
The same goes for the Future.. it cant exist yet because it hasnt happened yet.. because what's to become is existing now.
And as far as time dilation effects of going fast in a spaceship.. that's more akin to a form of suspended animation.. ship time will slow down while the rest of the universe goes on as usual. It's more complicated than that, but the point is that the space traveller never leaps through time.. he still coexists with Time itself.

wormhole. like stargate. ahaa

Let me break all the laws of physics to make a point!!!!

I construct a spacecraft capable of unlimited, multiple times speed of light speed. So now I travel to a spot 100 light years away at so at 10,000 times speed of light. I arrive in say after 3 days of travel. I then look back to where I started and the faint glow of our sun being viewed is from a hundred years ago, that is as long as it has be traveling. I return back to earth at 15,000 time light speed. I arrive back at real earth time no closer to the past or the future. Only the elapsed time I was physically gone. No matter how fast I travel I cannot go to any time earlier than the time I left plus any elapsed time . I am only changing the distance the light traveled. I can only move away to a point that allows me to view the past from a far distance. I can not take part in that past.. I can only move in present real time

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Hi Bob,that's the question isn't it . I don't want to put any spiifcec time frames here, since those never hold. I don't have much work to do (updating system, icons and few other small things) and I will release the beta version (need to get some feedback and discover as much bugs as possible). I hope it will be soon, but hope wont get me there, so I will try to get more time for this in this few weeks so you can finally get the taste of it.

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What a great Series!I love the Barrel through a wormhole approach. It really opens your mind up to what could be possible. I remember watching
this episode if we can figure out how to do this we can do anything. Just imagine traveling the universe so quickly.

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