posted on Dec, 11 2006 @ 02:59 PM
I would suggest two possibilities:
1.) Time Travel is possible, but not with a "vehicle" like a time machine.
2.) Anyone could have visited the past at any point without our noticing.
If I am to understand the prevailing math correctly, in order to travel backwards in time, one must travel faster than light. In order to travel
faster than light, one must have zero mass. This would make time travel in a "vehicle" impossible, as even a single gram of mass would increase to
an infinite amount the closer it got to the speed of light, and the more mass an object has, the more energy it takes to increase its speed. This is
the main idea why people believe FTL travel to be "impossible".
However, if something has zero mass, and takes up zero space, then it should be possible to achieve a speed faster than light. So what has no mass and
takes up no space? Wave patterns, such as electromagnetic fields (EMFs). And, coincidentally, EMFs travel at the speed of light. If you want to send
an EMF backward in time, all you have to do is figure out how to speed an EMF up and figure out a way to "aim" it.
Thus, if human consciousness were able to be completely converted to a wave pattern (a literal Out of Body Experience), and that wave pattern somehow
broadcast faster than a normal EMF, you would have human capacity to go back in time, but only to observe, and probably not to return, and almost
certainly not to interact.
Now... all that aside, even if one were to somehow figure out how to make a De Lorean go back in time, there is a HUGE problem of the Earth's
position. This is what a lot of Sci-Fi writers fail to take into account.
If you were to try and travel back in time, just ONE SECOND you would either find yourself 30 km above the ground, or 30 km below it, because the
Earth travels through space at 30 km/second.
Add to that the problem of Earth's wobble, orbital eccentricity, and the slow degradation of our orbit around the sun, and you have a logistical
nightmare in finding just the right XYZ coordinates, much less the correct time coordinates.
Anyway, point being is that lots of people could have tried and even succeeded in travelling back in time, and we'd never know because they either
ended up buried miles below the surface of the Earth, or ended up hurtling off into space as just another random object, and even if they did get
everything just right, the chances are really high that they could only visit the past in wave-form.
Hope this helps.