One might think that time travel is difficult at best and impossible at worst, but it’s not. It’s actually quite easy to accomplish. The most widely used method of time travel today is called growing old. We do it all the time.
The Dangers of Time Travel
If on the other hand, you want to travel back in time, that’s a whole different challenge. So let us assume we’re going to build a time machine that will let us do just that. How do we test it to make sure it works? Unless of course you want to be the guinea pig and risk ending up in a time or place that might not be so hospitable to your fragile existence. You wouldn’t be the first time traveler to end up frozen in the middle of space, due to the small oversight of earths moving trajectory around the sun, and the relative motion of the solar system within mind puzzling accelerated expansion of the larger universe. But let us not worry about that for now.
One theory states that even if a time machine were built, you would still not be able to time travel to an age prior to the existence of your workable machine. It was proposed as a reason why time travelers have not come back from the future so far, for lack of a vessel present in this day and age to do so. It also prevents you from going back in time and killing yourself before you were able to actually build your time machine, thus making it impossible to travel back in time to kill yourself in the first place, and creating a temporal rupture in the fabric of the space time continuum that could possibly destroy the entire universe. In other words, before we can bump into other time travelers or create utterly destructive paradoxes, we first have to build a time machine.