First. If you could go back in time what would you do? Stop Antonio Luna from going to Cabanatuan? Stop Ferdinand Marcos from leaving Malacanang in 1986? Prevent the death of a loved one? Win the lottery in 2000 and leave it to your future self? Buy stocks in Google or Apple? Or watch the Triumph of Julius Ceasar as he entered Rome? Second, would you rather go a world where Antonio Luna did not die and he was able to convert Baguio into a fortress? Or perhaps a world where things turn out differently?
Time travel and multiple world have been a common thread in Art and Culture. It would be interesting to look at has there been a scientific basis for this and has Science & Technoloy had an impact in this thread of Art & Culture, and vise-versa?
One recent and entertaining examples of this is the cartoon Futurama, where in the episode Roswell that Ends Well and Farnsworth Paradox. In films you can see this in Terminator; Back to the Future; Somewhere in Time; The Time Machines; Looper and the 12 Monkeys. Or perhaps you might remember the other tv series like Time Tunnel; Dr Who; Quantum Leap; and those Star Trek episodes. But does this have a scientific basis?
Interestingly enough there are theories for the Grandfather Paradox; Multiple Worlds and time travel. It is a world that can be equally aggressive as any chronos-time war and confusing as the Crisis in Infinite World. There is the story of a party hosted by Stephen Hawkins complete with food and champagne but no guests, since the invite was only given a few days after the party. Hawkin’s point was quite clear. Time travel back into time was not possible. Although, nothing in Science and Technology is written in stone.
The Theory of Multiple Worlds came about because of the study of Quantum Physics. Scientists observe that in the quantum universe things were not behaving as they should: based on the established laws of physics. Something else was at work. Multiple Worlds made it possible to explain how these things work differently from what was expected. And now we even have String Theory.
Physics is not my area of science but it is important to see how Art and Culture were able to explain the physics of time travel and multiple worlds by depicting it in the form of a story. Making more palatable to its viewer and reader. In the process making the science more understandable.
There is however a caveat to this. The first one would be the depiction of science and technology in art and culture becomes credible when grounded in actual study. The second it should recognise that Art and Culture has an equally important effect on Science and Technology. And this is because Art and Culture conveys: (i) Ideas that are hoped for: a better world via Science & Technology; (ii) Society’s concern over the use of Science & Technology: Frankenstein’s Monster & the Atom Bomb; (iii) Warning of the consequences of actions in the future: I am Legend and a Distant Sound of Thunder; and (iv) glorying or condemning Man, Science & Technology: The Veldt and the Martian
Also as we enjoy the products of Art & Culture that inspire and in return inspire Science & Technology one vital thing that must be considered when learning about their scientific basis is that these are products of the scientific process. In other words these theorems and laws are considered plausible and valid because they were proven, until at such point were they proven to be otherwise. In Science and Technology the only thing dogmatic is the adherence to critical thinking and importance of valid proof.