Fifteen years later, another fleet of the Pabodilon civilization arrived at the star field where the native civilization race of the second Andromeda galaxy is located, and half a year later, the native civilization race of the Andromeda galaxy was wiped out, and the Earth Federation obtained another kind of scientific and technological information.

Twenty-six years later, an exploration fleet of the Pabodilon civilization contacted a civilization race, and after the exchange, the Earth Federation exchanged information with that civilization race.

Thirty-one years later, a civilized race was once again contacted, and a scientific and technological information was exchanged again.

Fifty-seven years later......

Three hundred and seventeen years later, Regetlos evolved into a fifth-level civilization, and the main body became a white dwarf, and five years after the evolution was completed, Regetlos also embarked on a journey.

Four hundred and ninety-five years later, the Silver Wing Civilization successfully broke through the fifth-level civilization, and the race flagship became a huge steel planet, and at the same time, all the people of the Silver Wing Civilization changed their life forms and became silicon-based lifeforms, and their bodies became silicon-based lifeforms similar to the Terminator T-X machine qì human form.

Three years after breaking through the fifth-level civilization, the Silver Wing Civilization set out on an expedition, and within two hundred years, it broke through the home planets of the native civilization races of the four Andromeda Galaxy and obtained four scientific and technological materials.

Eight hundred and fifty-three years later, the Pappodiron, Regotros, and Silver Wing civilizations returned to the Earth Federation, and all disciplines collected scientific and technological data from the civilization, and mankind began to make the final preparations before breaking through the fifth-level civilization.

However, the first problem facing the Earth Federation now is the design of the fifth-level civilization race flagship, and hundreds of years have passed now, and the design plan of the race flagship has not yet been completed.

Xiang Qian also had a headache about this problem, and finally he ordered before all the scientific and technological data was cracked and consumed. Let's not study the issue of the racial flagship until all the scientific and technological information is thoroughly consumed. I'm looking at this question.

"Boss, there are new findings from the Academy of Sciences. Please come and have a look. Starry Sky said to Xiang Qian.

"What new discoveries are going to let me pass, and now the new discoveries are made every day in 100,000, and what is it this time?" Xiang Qian asked curiously.

"Boss, Dean Li said not to let me sue you."

“…… Okay, I'll go over for a trip. ”

As soon as Xiang Qian heard that it was Old Man Li who said, he knew that he must have found out, otherwise he would have looked for him, and he would not let the starry sky sue him.

Soon, Xiang Qiantong guò gravitational tunnel came directly to the location where Old Man Li was. Now the area of the Earth Federation is so large, even a spaceship has to fly for a while, so in order to save time, the Earth Federation has gravitational tunnels in many places.

Although the gravitational tunnel is not as fast as the space gate and is not teleported, it is also faster than the time it takes for the ship to travel.

When Xiang Qian arrived here, they had all arrived, and a large group of scientists were gathered in the middle of the hall talking about something.

"What is this?" Xiang Qian came to the side of a few people, looked at the big round ball in the middle and said.

"This is a four-dimensional model of space." Old man Li looked at Xiang Qian. Said proudly.

"This is a four-dimensional space real yàn model, is it true? Didn't Vicadia simulate? Xiang Qian said in surprise.

"That's right, this is a real four-dimensional space, not a simulated projection."

Xiang Qian was really surprised after hearing this. He knew very well what the four-dimensional space technology meant to the Earth Federation. But for so many years, the Earth Federation has been studying the four-dimensional space. It was all simulated by Vicadia's huge computing power, and there was no real use of technology to form a four-dimensional space.

But now the four-dimensional space can finally be formed using technological means. Then the most critical step has passed, and the rest of the research will go smoothly.

"Doesn't it say that four-dimensional space has time coordinates? Why can't you see the time coordinates? Xiang Qianzai looked carefully at the huge ball in front of him. It turned out that apart from being a little dizzy, there was no timeline at all.

"Starry sky, turn back the clock by ten minutes." Old man Li said with a smile.

In an instant, the light inside the sphere in front of me was very distorted and disordered, as if you had fast-forwarded while watching a movie, and it took a few seconds before it returned to normal.

"Four-dimensional space can turn back time?" Green Gesen said in surprise.

"No, time is indeed a coordinate for four-dimensional space, but each coordinate is just equivalent to a standard room, and time has nothing to do with regression." Old man Li shook his head and said.

"Didn't that just go backwards?" Dillon immediately asked.

"It's not going backwards, it's just a point in time ten minutes ago, and we can observe what happened at that point in time, but we can't change what happened ten minutes ago." Old man Li said.

"Does that mean that the four-dimensional space is just one more observable coordinate than the three-dimensional space, just like when we read a book? A book has 100 pages, and when we see 40 pages and suddenly forget a plot character, we can turn the book to page 20 and re-read the content of 20 pages.

Because we are in three-dimensional space, we can observe the situation in two-dimensional space at will. And for two-dimensional space, those 100 pages are the time coordinates, because the story is coherent, and even if the people in the story want to go back in time, they don't have the power to turn 40 pages to 20 pages, because they are in two-dimensional space.

But we can see 20 pages, but we can't change 20 pages, and even if we change 20 pages, 40 pages are already doomed, and even changing them won't help.

So our control over the two-dimensional space is the same as the control of the four-dimensional space over our three-dimensional space. It's just that the four-dimensional space can see the timeline of three-dimensional space, and the time of each day we live is the same as the coordinates of the pages of a book. Xiang Qian squinted his eyes and said.

"That's right, it can be explained in this way, although it is not all right, but it can be understood in this way." Old man Li nodded and said.

"Can the future change? Is the future we observe now the real future? Xiang Qian asked.

"The future can change, but the cost is very large, and the future we see now is uncertain, only when our time flows to the future, the future at that time is the real future, but at that time, for us, the future is already now."

Everyone didn't speak after listening, although Old Man Li said it was very tongue-twisting, but everyone understood the general meaning.

But now everyone is silent in the shock of this thing that can be changed in the future, thinking about what this means for the Earth Federation, what they can get, and what they will have to deal with. (To be continued......)