A Quote by Michio Kaku

Physicists often quote from T. H. White's epic novel The Once and Future King, where a society of ants declares, "Everything not forbidden is compulsory." In other words, if there isn't a basic principle of physics forbidding time travel, then time travel is necessarily a physical possibility. (The reason for this is the uncertainty principle. Unless something is forbidden, quantum effects and fluctuations will eventually make it possible if we wait long enough. Thus, unless there is a law forbidding it, it will eventually occur.)
I myself believe that there will one day be time travel because when we find that something isn't forbidden by the over-arching laws of physics we usually eventually find a technological way of doing it.
Originally, the burden of proof was on physicists to prove that time travel was possible. Now the burden of proof is on physicists to prove there must be a law forbidding time travel.
Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle.
Today, we know that time travel need not be confined to myths, science fiction, Hollywood movies, or even speculation by theoretical physicists. Time travel is possible. For example, an object traveling at high speeds ages more slowly than a stationary object. This means that if you were to travel into outer space and return, moving close to light speed, you could travel thousands of years into the Earth's future.
prospect, n. An outlook, usually forbidding. An expectation, usually forbidden.
Segregation or separation is thus a basic principle of Biblical Law with respect to religion and morality. Every attempt to destroy this principle is an effort to reduce society to its lowest common denominator.
If love is great, then it is worth fighting for.” “What if it is immoral somehow? Forbidden?” “Forbidden? But my father’s love for my mother was forbidden, or at least against the law. Or do mean if she is married, or a vampire?” “Or a married vampire.” “Well, nevertheless,” Will said, with a grin. “One should fight on. Love conquers all.” Will and Jem
Once the tires start to wear out the better car will prevail eventually. It might take a little bit of time, but eventually it will be the best. That’s why everyone is trying to make their car good on the long run.
The incomplete knowledge of a system must be an essential part of every formulation in quantum theory. Quantum theoretical laws must be of a statistical kind. To give an example: we know that the radium atom emits alpha-radiation. Quantum theory can give us an indication of the probability that the alpha-particle will leave the nucleus in unit time, but it cannot predict at what precise point in time the emission will occur, for this is uncertain in principle.
Trust me: you make a movie about time travel, and you know for a fact humans will never travel through time. The paradoxes that come up just from trying to tell a story with time travel really illuminates the fact that it's impossible. It will never happen. We can barely get through a movie that involves time travel.
Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle. String theory does so again because a point particle is replaced by a string, which is more spread out.
Anything in this culture that stands still long enough eventually becomes okay if a person can derive an income from it. Eventually, pay-per-view public execution will happen, and it will be half-time entertainment.
Curiously, a principle affects your life whether you are aware of it or not. For instance, the principle of gravity was working long before the apple ever fell on Newton's head. But once it did, and he understood it, then we as a society were free to harness this principle to create, among other things, airline flight.
It's kind of a mysterious process, but something will catch my attention, and I'll make a note about it. I may even write a few pages about it, and then I'll put it aside, but I'll sort of keep it in mind. Then as time goes on, other things will gather to it as if it's a magnet, almost, and eventually, there's enough to make the story.
The one great principle of the English law is, to make business for itself. There is no other principle distinctly, certainly, and consistently maintained through all its narrow turnings. Viewed by this light it becomes a coherent scheme, and not the monstrous maze the laity are apt to think it. Let them but once clearly perceive that its grand principle is to make business for itself at their expense, and surely they will cease to grumble.
I find the whole time travel question very unsettling if you take it to its logical extension. I think it might eventually be possible, but then what happens?
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