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originally posted by: swanne
a reply to: Rabb420
Actually this was my first thought too, but further studying of Einstein's Minkowski spaces show that when we go back in time, we stay in the same "universe". But... I checked the geometrical aspect of space, and your suggestion could indeed work if the Universe had one more time dimension. The good news is, I cannot falsify your theory, because we don't know if the universe has one or more time dimension - we are only assuming it has only one because that is what fits best Occam's Razor.
Oh, really?
originally posted by: game over man
The grandfather paradox would still affect the present thus creating a new timeline or parallel universe.
originally posted by: swanne
But as we have discovered through QM and entanglement that no time is needed to propagate state changes.
The biggest one being how are the other universes created.... They were created in their own big bangs in a multiverse
each universe a slice of the whole, although not entirely segregated from each other they all exist outside and separate from each other.
The issue most people have with time is trying to get your head around the fact that cause and effect are not as linear as one might think and that something that happens in nature seemingly completely at random could be the result of something completely unrelated in our future... due to the fact that past/present and future are all connected.
originally posted by: game over man
But then you also are basically saying we could always return to the present.
So are you saying the past is a physical location we can go to and change an infinite amount of times and it would not change the present?
But how would one scenario of saving the Earth obviously change the present
and how would killing your grandfather not change the present?
1. Travelling into the past in the same universe would violate the first law of thermodynamics. To simplify, let's say you had a AA battery, a day later you travel back in time and give yourself the battery, now you have two. The next day you do it again and then you have 4. And so on... Now you are effectively creating energy.
2. Infinite amounts of energy does not necessarily mean "all the energy in the universe". As per my first comment, if recursively sending energy into the past was possible that qualifies as infinite amounts of energy. A faster than light engine would just need to continue using the energy before it used it. Of course you still need to get the thing started somehow.
3. Continuing down this rabbit hole for a moment. What if the big bang was the result of a particle sending itself back in time. Meaning all matter in existence is just a clone of the first one. This would be the first faster than light event and would explain how matter is continuously created(if it is).
originally posted by: capragenus
The one the OP has suggested and obviously the parallel universe theory. BUT I think there are only 3. Past present and future. Maybe there are thousands, who knows but in my head I see three. But any three can be changed if time travel can be achieved.
originally posted by: anonentity
This I assume is the point where in quantum science says all information is saved.
The Laws of this Universe state that the speed of light cannot be violated, but this law would not apply at the boundary point to another Universe, or even a point in this universe that all rational laws were suspended, like the event horizon