If the wormhole of time takes us back to the past, can it change history?

If I could do it all over again, I would choose Li Bai! If you can go back through the wormhole, would you like to take such a trip? You can close your eyes and think. What do you want to do besides becoming Li Bai? Hawking, a contemporary physicist, believes that the parallel universe means that if a time traveler goes back to the past and changes history, then the timeline will diverge and the bifurcated timeline will start another period of history. In another timeline, "Grandpa" still exists. This explanation solves the problem of "grandfather paradox" well, and the time when the timeline diverges is also called parallel universe.

The parallel universe was originally put forward to solve the problem of going back to the past, interfering with history and leading to the destruction of causality. It was just a theory at first, but now people can also find some support from some physics, such as some effects in quantum mechanics.

Quantum theory is a set of theories used by modern physicists to study the microscopic atomic world. Its core idea is that nature is discontinuous at the micro level, which is completely contrary to Newton's classical theory.

1994, David deutsch, a scientist at Oxford University, published a paper in Scientific American magazine: Quantum Physics of Time Travel, which expounded the physical possibility of time travel. He believes that this possibility is based on quantum mechanics, because in the subatomic world, quantum uncertainty dominates, and an electron hitting a proton may turn left or edge, but this uncertainty does not. According to the multi-world theory, the universe has countless parallel worlds from the beginning.

It seems that with the concept of parallel universe, the problem of time travelers changing history can be solved in a coordinated way, so now we can see that more and more movies traveling through time and space frequently use the concept of parallel universe to repair their logical contradictions. With the concept of parallel universe, the concept of time machine can move forward boldly.

Wormholes are the most convenient way for human beings to travel in time and space, but how can we get wormholes?

Theoretically, there may be some wormholes in the universe, but humans have not found a way to find them yet, and no wormholes have been found. If we can find and make rational use of these wormholes, we may travel in time and space. In science fiction movies, we can also see all kinds of artificial wormholes. In fact, the time machine studied by scientists is still far from what we ordinary people think. Now scientists are studying that an atom or ion can be reversed in time.

Time travel may be realized in our next generation, or it may always be a dream. In the face of this magical and beautiful dream, if there is such a time machine that can let us go back to the past or cross into the future, maybe we have no choice but to marvel. Can we come back? We may go back to the past, to the grotesque giant reptiles of Jurassic, or to the barbarians of Paleolithic, or we may fly forward to a more recent era, in which people are still people, but we can find the answer to the mystery of our own time. Or we can go back to the past, go to another parallel universe, confess our past mistakes and start over. ...

Back in the past, crossing the parallel universe has brought endless reverie to human beings, but at present everything only stays in theory, but human imagination and creativity are endless. Who would have thought that 500 years ago, in a distant different country, you could have a face-to-face video call, as if everything was in front of you? And who can imagine how far technology can reach in 500 years?

If I could do it all over again, I would choose Li Bai! If you can go back through the wormhole, would you like to take such a trip? You can close your eyes and think. What do you want to do besides becoming Li Bai?

Happy moment: a man's screen name is not to be a man in the next life, and it is published as a talk. Another screen name is to be your woman in the next life, and the girl who likes her comments: Don't make me sad, okay?