After communicating with Mu Guang, Liu Xuan has made a blueprint for the future, and the first thing to solve must be the problem of energy, and complete Einstein's assumption about bricks, that is, to find a way to make all kinds of atoms can be fissioned or fused to get all the energy of bricks.

The second step is probably the most critical step in the history of human civilization, which is the problem of antimatter, to find a way to make antimatter in large quantities, and then create an antimatter engine suitable for space flight, the most important thing is to safely attach antimatter to the surface of positive matter. It is well known that the collision of antimatter and positive matter will release the "most complete" fission reaction in nature, and the annihilation of positive and antimatter will bring a large amount of energy.

The black hole next to Europa still exists, breaking through Jupiter's gravity to reach Europa is not a difficult thing now, the most critical thing is to pass through the wormhole, this step is more important than getting the speed of light, this is the only way to get tens of thousands of light years away in an instant, what they need is time.

Time, in physics, at least in the present stage, can only be stretched, but it can never go back to the past. According to Einstein's theory of relativity, once the spacecraft reaches the speed of light, the people on the spacecraft may not feel anything, but the people waiting on Earth have passed for decades or more. From the perspective of the universe as a whole, decades have passed, and it is impossible for mankind to go back to the past.

If you take 10,000 steps back, even if you go back to the past, can you change anything? Time is like the Yangtze River, rolling the Yangtze River east, we are like water droplets in the Yangtze River, except for the influence of the weather, once from the upstream to the downstream, it is difficult to go back. Assuming we can go back, then the tributaries of the Yangtze River are the only way for us to change our future. The Yangtze River is a definite fact for the future, and its tributaries are the only way for the past to change the future.

Suppose a person, like a drop of water in the Yangtze River, travels back in time through certain methods, whether through the speed of light, or into a higher dimensional space. In short, a drop of water returned to the birthplace of the west from the mouth of the Yangtze River, and he wanted to change his future, so with the power of a small droplet, how to make the Yangtze River appear a tributary, or even make this tributary become the main stream of the Yangtze River? It is difficult, theoretically, to change the outcome of the future by changing the past, possibly. But, in practical terms, it's hard.

These are all questions that Liu Xuan will have to think about in the future, at some point in the future, Liu Xuan will be like that little droplet, he needs to come back, he needs to change, or, he can't change anything.

Liu Xuan's current idea is to enter another galaxy through the wormhole, this galaxy may be thousands of light-years away from the solar system, and Liu Xuan may not be able to return for the rest of his life, but as an expert in astronomy, the starry sky is the best cemetery he has chosen. Just like wanting to die Liu Qingyun, all the researchers want to have the most intimate contact with the sea of stars, even if the final result is death and annihilation.

The first thing to do is to solve the problem of the coexistence of antimatter and positive matter, and now the only way to preserve antimatter for a short time is through the binding of magnetic fields, so that antimatter and positive matter cannot be contacted, preventing them from annihilation.

In fact, these methods have been applied thousands of years ago, and after a thousand years, they have made a breakthrough, but Liu Xuan is a member of the aerospace research laboratory, and he has little contact with antimatter.

For Liu Xuan, the independence of the Antimatter Research Laboratory and its absence from the military is great news for the aerospace industry.

For thousands of years, people have believed that the speed of light is the fastest speed in the universe, just like "absolute zero", which is an unsurpassable existence, but later people discovered black holes, black holes that can swallow light. This is a clear indication that the escape of a black hole is much faster than the speed of light.

The study of the speed of light has its own theories, but those theories are really illusory, most of them are still in the stage of hypothesis, and people simply do not know where to start and what fuel to use to make the light-speed engine.

At present, the most practical thing to do, the existence beyond the speed of light is the black hole next to Europa, tens of thousands of light-years in an instant, the speed of light cannot be compared at all, of course, this involves high-dimensional space, who knows what the light or everything is like in high-dimensional space? No one knows, and if they did, the civilization of the earth would have evolved.

Out of the research room, Liu Xuan was still thinking about these things in his mind, but these things brought the motivation for research. Liu Xuan is already in his thirties, in fact, he is more than one hundred and thirty years old to be exact. Liu Xuan never thought that he would live to see the upgrade of the earth's civilization, Liu Xuan just wanted to rely on his own strength to contribute to the upgrade of the earth's civilization. Liu Xuan didn't think about his own change, he firmly believed that he really saw the seventh-level civilization, he also believed that he had really become a creature of the sixth-level civilization, and he knew that the evolution of the interstellar civilization was not only the progress of science and technology, but also the evolution of genes.

Liu Xuan knew how to solve some important things, although he was only a sixth-level civilization creature for a short time, but he did get some cosmic truths, someone once said: The end of science is theology. Liu Xuan is not sure whether this sentence is right or wrong now, everything has a cause and an effect. The truth that Liu Xuan got can't even be explained in words, let alone a formula? Fortunately, Liu Xuan knows how to do it, but on the whole earth, the only one who knows how to do it is Liu Xuan, and there is no way to pass it on, which is Liu Xuan's only pain.

The lab is still busy, many people are arguing about verifying a formula, and many people are quietly doing their own research. If nuclear fuel is the fuel for space engines, then all the researchers in the dungeon are the fuel for human civilization.

Mu Guang's research team has a long-term vision, and there is no mistake in the theory that everything can be fissioned or fusion, but it should also be discussed separately, the main direction of the research, on the periodic table, the elements before iron tried to carry out fusion reactions, and iron later tried to carry out fission reactions, including iron, so the most critical element is iron.

In the laboratory, iron is usually the most difficult research. In other words, to solve the fission of iron, the fission of all the elements behind it is not a problem. The fusion problem of manganese is solved, and the fusion of all the elements in front of it is not a problem. But how easy is that? What people need to learn and study is to use these two elements to pry open the door to an infinite future!