We have all heard the seemingly odd explanations given by NASA and other space astrophysicists about the problems associated with time travel. Well in sort most of what they claim do not hold water! Firstly how many times have we been given some story about distances and time to traverse them, for example, the galaxy you reside in is suppose to be around 100,000 light years across, about correct in this assessment. Nevertheless, you are then told that this would apparently transpire it would thus follow, it would take 100,000 years at light speed to cross it. Assuming you have light speed ability of course. This is a ridiculously and preventatively long period of (TIME). As a result, it becomes almost becomes a meaninglessly long concept to even conceive.
The truth:
As one of your great visionaries Albert Einstein discovered space time is relative, this also applies to time as well as space as they are inextricably and mutually exclusive to each others existence. So, what does this mean? This means on earth to travel 4 light years at light speed, on earth from our time and perspective observation, 4 years would have passed before you reach point (B) from point (A) common sense. The 3 dimensional logic of Earth breaks down when we consider the passages on board this craft at or approaching light speed. Time “from their perspective”, time slows the near you get to light speed. Thus at about 85 to 90% of 186,000 MPS time all but stops, this thus has an effect of collapsing the very fabric of space, as it cannot maintain perceived normal 3D integrity, again as they are mutually exclusive to each other! What does this imply? This effectively means space itself collapses and to the occupants of the craft, space becomes a singularity, all of space. As a result, you become at this point omnipotent within the known 3D universe. This actually means all of space and all of time, become instantly available to the occupants of the craft. The problem is, this assumes we are talking of a physical 3D craft and occupants. Also, As Einstein discovered, as you approach these speeds, you and the craft become infinitely large, thus needing infinite energy, to propel yourself. It becomes exponential in it’s requirements of energy. How do you circumvent such restrictions? The only known way is to jump into the 4th dimension unshackling the restraints of these physical restrictions holding the craft and occupants within the 3D universe. This you call the quantum realm of existence of antimatter, quirks, and other forms of reality. This has the effect from the 3D worlds perspective of appearing and instantly disappearing into nothing. This is why, you see, some of these crafts you call UFO’s, appear and disappear into nothing. They effectively jump into the 4th dimension. With this ability, time travel and space travel become almost a meaningless term, appearance in this dimension is more a temporary focus of attention rather than an existence. Therefore, time travel, as you would use the term is obsolete as it effectively does not exist, to the craft and the occupants!
In conclusion: Your journey aboard the craft across your galaxy from point (A) to point (B) 100,000 light years becomes instant with no time at all passing by! Your worlds view of worm holes is not quite correct although it is on the right track. In fact what happens is the entire universe becomes what you call a worm hole not a narrow corridor. You would be able to pop in and out of any time and place, within this physical universe. This does not consider other universes which are just as real as yours as stated within the quantum realm. You call them dimensions, of which, there are many.
The truth is these people never left! They are still there, within their own time frames, carrying out a never ending trip around what they did at these times. They are Echo's, as the mind is freed at the death of the body to be able to truly experience the 4th dimention and all that it offers. We are locked within the body, and within this 3D world and universe, until we die!! But this reality gives us an ability to experience what it's like at lower planes of existance!