do you believe travelling back in time will ever happen?

Question

if you believe it will, then it already has. Is it true that if you could travel to earth from mars in less than a blink of an eye you would arrive approximately in the roman era?

Answer 1

see my only problem with time travel is that it has to take space into account also

like the earth is hurtling through space right now....if you were to go back in time even an hour at the exact same point in space the earth would be elsewhere and you'd be floating away

the lesson is...when traveling back in time, bring oxygen just in case

Answer 2

do you believe travelling back in time will ever happen? No.

Is it true that if you could travel to earth from mars in less than a blink of an eye you would arrive approximately in the roman era? No, in fact it would be the future on earth. To travel that quickly you must exceed the speed of light. As you approach the speed of light, your mass increases. Eventually, you become so massive that you warp space and time around you. It would seem that you would get to Mars in an instant, but time passes even more on Earth.

Answer 3

Time is a complicated deal and currently impossible to test. We don't even know how it works. There are theories that time is cyclical (repeats over and over again--it goes forward to a certain point and then restarts itself at the beginning), or that it is random (we jump from one point on the timeline to another and then another; since our mind is going with it we don't fully realize we ever jumped far into the future or to the past). Both of these theories would explain the feeling of deja vu however (you feel you lived it before because you actually did live it before; and you only feel it on a subconscious level).

Or time may be in the one direction straight-line that we see and feels natural to us. Without knowing which one it is you can't design a way to travel along the line since you don't know how the line works. You may already be time-traveling (if one of the first two theories occurs). Time travel may be completely impossible as well. Time may not even exist specifically in that way, but rather simply as a term we came up with to differentiate between changes in the universe.

By that I mean that you and I can occupy the same space but we cannot do it at the same time. So if I stand in one place at 1:30pm and you stand there at 2:30pm the universe has changed because you and I have changed positions. Since everyone and everything is moving, living, dying, etc. the universe is changing and we came up with time as a way of verifying for everyone that when you are talking about a time you meant how the universe was at the time. See how confusing this can get.

But what this means is that if you can find a way to recreate the universe setup at 1:30pm (or anytime, just using my example) in every way including restoring our age and bringing back those who died during that hour or shoving back into the womb those who were born during that hour (that means humans, animals, plants) and so on you would effectively be time traveling and changing the future.

Answer 4

No, but if you could travel that far 'in the blink of an eye' that would amount to time travel since you'd be going faster than light.

Light takes a matter of minutes to travel from Earth to Mars (exactly how many depends on where they are in their orbits, but always less than an hour) so that's how far you'd have traveled in time.

Answer 5

No, I don't believe it will ever happen. For one thing, time is just a concept. And once a thing has happened, the so called past will have ceased to exist, except in our memories of course.

Assuming arguendo that humans did have the ability to go back in time, a time machine would still never be invented as this will inevitably destroy our future. If we had a time machine, we'd be so busy going back in time and correcting our littlest "mistakes" that we'd constantly create multiple alternate futures, and then go back again and redo everything.

Also just imagine the cosmic havoc that would ensue as not everybody would be satisfied with one particular future outcome. Everyone would selfishly want a particular future outcome for themselves to the detriment of others. We'd probably have temporal time wars and destroy the very fabric of reality itself.

If only to protect this disaster from ever happening, people from the future would probably send people on a mission to prevent the invention of such a time machine in the first place.

Answer 6

Time is not something to be controlled, its just never going to happen, if it was it means that we have no control over what we do and we would have experienced people from the future travelling back in time. Seriously, if you could travel back in time, what would you do, someone would go back and change something even if they did create laws.

You can't travel from Mars in a blink of an eye, we can't go across the street that quickly let alone across space.

Answer 7

The jury is still out because our understanding of time and space keeps changing year by year. What scientists thought was impossible 20 years ago, is now given consideration. It's like asking scientists in the 1860s if they thought that air travel is possible or traveling to the moon. What kind of answer do you think they would give?

Answer 8

Not until we can control black holes. But yes, it is theoretically possible. And no, Mars is only a few light minutes from earth. You wouldn't end up anywhere NEAR Roman times. Although transport across such a window would indeed take place in a moment, it wouldn't shoot you back unless you adjusted it specifically to do so.

Answer 9

It will happen only if the Big Bang culminates in a Big Crunch, where the universe reverses the expansion and comes rushing back in on itself. If that happens, time will run in reverse. Of course, from the perspective of observers in such a universe, everything will seem 'normal'. No one will be aware of anything unusual or amiss, as all biological and physical processes will operate according to the rules of space-time applicable at that point. Such observers may even think about our time-forward universe as a bizarre abstraction.

Answer 10

Time travel is the concept of moving backwards or forwards to different points in time, in a manner analogous to moving through space. Additionally, some interpretations of time travel suggest the possibility of travel between parallel realities or universes

knowing and understanding the einstein's relativity theory makes time traveling machine be invented.
but as long as there is no one who really understands it... maybe in the 3th millenium...

see this:
http://en.wikipedia.org/wiki/Time_travel
so:
If you would travel with the speed of light 20 years, you would turn back in time. maybe someone will invent some machine, who knows?
in 1990, was someone thinking of internet and tv?