In the following days, both China and NASA tried their best to contact the "Tianyou", which was extremely frustrating, but the phenomenon that followed made them overjoyed.

"You're saying the Grim Reaper dwarf planet is gone? Are you sure? ”

When he received a call from Hong Bin, Director Wan thought that he had contacted Yu Ze, and Yu Ze had also completed the task, so he couldn't help but frown with joy and almost jumped on the spot.

"Yes, we and NASA have searched many times, and we have found no trace of the dwarf planet...... But Yu Ze was not contacted. ”

"Not in touch?" Director Wan was stunned, "Then why-"

"One possibility," Hong Bin said calmly, "Yu Ze succeeded, but he deceived us, if we want to complete this almost impossible task, the price is not simply more than ten years of life, but his own ...... All life. ”

Director Wan was silent when he heard this, and only after a long time did he say with difficulty: "Yes, I should have thought of this a long time ago, if I want to remove the dwarf planet, how can the price be so easy." Wait, so why haven't you found a dwarf planet? ”

"I don't know, there may have been something going on that we didn't know about."

Hong Bin couldn't answer this question either, "For the time being, we can only use the spare spacecraft to go to the destination to search." ”

……

The outside world was in turmoil, as no news had been received about Yu Ze for several days.

However, a week later.

The statement jointly issued by China and the United States believes that the "Grim Reaper Dwarf Planet" has been solved by Yu Ze, and Yu Ze has gone wrong in the process, resulting in the loss of contact with Earth, and they are working hard to search and rescue.

As soon as the statement came out, there was a global uproar.

It's a pity that everyone understands that in the deep space of dozens of astronomical units on the earth, human beings have no ability to rescue at all, so it is just to comfort the public and show that they have not given up.

And in deep space, if something goes wrong, it may come at the cost of life.

Human beings all over the world, from Asia to Europe, from Europe to Africa, from Africa to South America, and the main human settlements in North America, can see countless human beings praying for Yu Ze's safe return from morning to night. But as time passed, the hope became more and more slim, and after half a year of searching, although the official still said that the search would continue, the monuments erected in various places have been officially acquiesced to some kind of ending.

As someone said, grief never lasts, and life goes on eventually.

Even if he saved the recognized "savior" of the world, his life could not immerse the whole world in grief forever, and people gradually returned to normal life.

It's just that the situation that once threatened all human civilization still makes human hearts palpitate, and suddenly realize the fragility of human civilization in the universe, and understand more that human beings must go out of the earth, go to the starry sky, leave the embrace of the "mother", and leave the cradle of life, in order to avoid similar catastrophes and helplessness.

Taking this opportunity, mankind may not be at peace forever, but during this time, peace has become the mainstream, and no politician can go against the will of the global public, and the people hope that science will prosper, that science will develop, and that everyone will no longer be afraid.

For this reason, May 11 every year has become a worldwide commemorative day to commemorate the "savior" who paid the price of his life in the process of saving mankind.

……

……

The timeline moves back to a certain time in the first half of 2023 when Yu Ze has not yet gained a special function.

A piece of news is published in the midst of many news, which is inconspicuous and does not attract the attention and attention of most people, and only a few people who are interested in it have noticed this news.

Back in the eighties of the last century, physicists discovered the presence of two huge spots in the mantle, one below the African continent and the other under the Pacific Ocean.

The elements of these two spots are very different from the surrounding mantle, and scientists have studied them intensively and named them large low-velocity domains "LLVP".

Where do these LLVPs come from?

The first concept is that billions of years ago the earth was still in a molten state, the surface is full of magma, since the surface is all magma, then the mantle must also be full of magma ocean, so scientists speculate that the liquid mantle is mixed with some impurities, and the surrounding area has a certain difference, and then slowly cooled, the impurities in the mantle are solidified before they are fully mixed, so there is the "spot" found today.

A more mainstream view is that the formation of the two "spots" is related to the movement of the earth's crustal plates, which is that the two "spots" did not appear so early, but were formed hundreds of millions of years ago with the drifting impact of the earth's crustal plates. When plates collide with each other, some of the Earth's crust is squeezed into the bottom of the mantle, and two "blobs" are formed.

There is also a view that many people have accepted that these two structures may have appeared long after the formation of the Earth, but given that they appear in the lowest layer of the mantle, next to the core, they may be caused by iron seeping into the mantle.

Each of these three arguments has its own reasons, and at first glance they all seem to make sense.

But in the last decade or so, a fourth view has emerged, which seems to explain "where" these two spots come from.

The California Institute of Technology research team believes that these LLVPs are the "wreckage" of an ancient planet.

Scientific experts believe that billions of years ago, not long after the formation of the earth, when the surface was still in a lava state, the planet that suddenly broke into the earth's orbit collided violently, part of which entered the mantle, and the other part went into space to form the moon.

This is the "Giant impact hypothesis" of the origin of the Moon, which holds that about 4.5 billion years ago during the Plutozoic period, the newly formed Earth and a dwarf planet in the same orbit collided, and the two fused to form the prototype of the current Earth, while the other part of the earth's crust and mantle were torn apart by the impact and sent away from the Earth, forming the Moon after subsequent independent accretion.

In this process, much of the material from the dwarf planet is "precipitated" to the bottom of the mantle magma flow and is sealed in a solid state, thus forming "two huge spots", so to some extent, these two large low-velocity body "patches" are not actually the products of the original earth, but the remains of the dwarf planet.

The scientific community that supported this theory of the Great Collision called the dwarf planet that hit the ancient Earth "Theia", named after the titan mother of the moon god Selene in Greek mythology.

(End of chapter)