I posted on this before here:
I spoke there about my email interactions with Dr. Richard Mueller regarding his theory on time. How he made my day with his comments in his email to me.
Dr Mueller sees time as being created as new space is created. Therefore, I extrapolated from that, it is impossible to go back in time because it does not exist anymore.
Other prominent physicists see time tied to entropy. Entropy continues to increase therefore it's not possible to "go against the grain" of natural laws and decrease it again through backward time travel.
Never mind if you don't understand those paragraphs. They're not relevant to this post too much. What I really want to get to is the proofs of time travel.
Now, mathematically it's perfectly allowable to go back in time. Just put a negative sign before the "t", which symbolizes time, and you have negative time, meaning going backwards in time. So, at least there is a mathematical "proof" it can occur.
Physically it doesn't seem possible nor practical. But that's just in theory. Perhaps there is a way but we just haven't discovered it yet. In fact, worm holes, if they exist, or can be caused to exist, suggest backwards time travel is possible. So if it is, where are all the people from the future popping back into our present? Isn't the fact we have never seen a person from the future proof that you cannot travel back into the past?
Well, not really. It would seem logical until further examined. For things such as wormholes, backward time travel appears at least a physical possibility (if you could overcome the huge logistics), but with a caveat. You can only travel back as far as when the portal was opened.
That means backward time travel cannot occur prior to the invention of the Time Machine. On that glorious day, should it occur, then you may see a plethora of people jumping back in time to be a part of that glorious moment of achievement.
Please don't contact the luny bin catchers yet, though. I'm not suggesting that day will ever occur. But I am crazy enough to entertain the possibility of it one day. Theories may rule out the possibility of backward time travel, but math and science still open the possibility.
The problem is introduced when logic enters the picture. Logically one could argue that if time travel were possible then someone could travel back in time and kill their parents, thus creating a paradox.
Well, let's throw out theories and logic. Otherwise how can we enjoy a good sci-fi film?
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It's important for scientists of all nature's to Brainstorm these thoughts and try to come up with different theories. Hopefully this can occur in someone's lifetime