How to realize time travel and space travel?

Japanese and American scientists try to prove the existence of parallel universes through scientific experiments and break the bottleneck that has plagued quantum physics research for half a century. Scientists are optimistic that maybe in the near future, human beings will really realize time travel and space travel. In many sci-fi movies, everyone will see such a plot: the protagonist uses a time machine that can shuttle back and forth between different time and space to change the course of historical events, and then the world develops according to two possibilities (before and after the change). In other words, from the moment a person returns to his own life, the development and evolution of the universe is divided into two parallel universes. If this person changes history, the world before the change still exists, and the changed world also exists at the same time-this is the most basic understanding of the parallel universe theory. 1954, Hugh Everett III, a young doctoral student at Princeton University, put forward this bold theory: there are parallel universes in the human world. After half a century of research and exploration, American scientists believe that if we can use this theory or prove the existence of parallel universes, human beings can travel in time and three-dimensional, four-dimensional or even multi-dimensional space. However, the theory of parallel universe has been puzzling the world scientific community. Einstein, Bohr and other world scientific experts have not made a clear definition of this theory, and the debate about this theory has lasted for half a century. Japanese scientist Dao believes that in the near future, as long as the bottleneck of parallel universe theory is broken, human beings can realize time travel and space travel. The latest observation of the universe shows that the concept of parallel universe is not a theory. Space is infinite and time is infinite. In the depths of the universe that we can't observe, there is a universe and time exactly like ours. Space is not limited to four dimensions. We are in a relatively static space with will, but the time is different. In our eyes, time is a relatively moving space, but in the space of parallel universe, time can be broken and created. An important point of the parallel universe theory is that there are a large number of parallel universes that are constantly dividing in nature. Are you hesitating to enter gate a or gate b? In one universe, you will walk into Gate A, in another universe, you will walk into Gate B ... There are endless parallel worlds around us that we can't see. The world we live in is like a radio. If we can find the button to change the frequency, we can travel from one universe to another, from now to the past, from now to the future, just like in science fiction. Why does the flame disappear? Why are some things fleeting? This is a realistic problem that physicists are trying to explore, and it is also a topic that the scientific community has been discussing recently. Theories about parallel universes, parallel universes and multiverses will continue to be the hottest topic to change the world.