"Captain?"

Aemond immediately spotted Pang Xuelin standing at the door and spoke up.

Suddenly, the remaining people also focused their eyes on Pang Xuelin.

Anthony, Cassy, Carrick, Benjamin, Frank......

Pang Xuelin matched the names of the remaining five people with the memories that the system instilled into him, and the names of these five people were not mentioned in the movie.

After they entered the world of their choice, they did not send any signal.

Clearly, these people have chosen to sacrifice themselves to explore the future of human civilization.

Pang Xuelin's gaze swept over the five people, and he smiled: "Let's continue training, I'll pass by and take a look." ”

With that, Pang Xuelin was about to turn around and leave.

"Brother-in-law......"

At this time, Murphy suddenly spoke up.

Pang Xuelin turned his gaze to Murphy.

The dirty little girl back then has completely changed her appearance now.

Tall and toned, millet hair tied into a ponytail, and a face that inherits the good genes of his parents, not much inferior to Chrissy.

"What's wrong? Murphy? ”

Pang Xuelin said.

Murphy's eyes narrowed slightly, and he smiled: "Brother-in-law, there is something I want to tell you." ”

"What's the matter?"

Murphy looked left and right and said, "Can I go to your office and say?" ”

Pang Xuelin hesitated for a moment and nodded: "Come with me." ”

Soon, Murphy followed.

Behind him, there was a faint sound of the players talking.

"When do you say, when will Murphy be able to bring down the captain?"

Pang Xuelin was a little speechless, and his team members seemed to be more and more jealous.

As for Murphy.

Pang Xuelin had a headache.

In my memory, this little girl has been showing some strange emotions to herself since she was eighteen years old.

Later, she came to work at NASA, and after graduating from college, this girl also came to NASA, and successfully passed the astronaut test, was selected for the Lazarus Project, and became one of the reserve members of the Lazarus Project.

The two get along day and night, and the affection between Murphy's words for himself can be seen by the players.

The world has experienced several devastating disasters, and there are currently millions more women than men, so in order to ensure the continuation of civilization, polygamy is allowed in this world.

Therefore, for Murphy's feelings for Pang Xuelin, although the team members saw it in their eyes, they didn't think it was so strange.

However, Murphy later heard about the Lazarus Project, and couples could not go into space together.

Murphy restrained his feelings for Pang Xuelin and behaved a little more normally.

After all, the reason why she chose to join NASA is that in addition to her feelings for Pang Xuelin, her personal hobby of aerospace and adventure also accounts for a very important factor.

Of course, occasionally in private, she will secretly tease Pang Xuelin.

When he came to the office, Pang Xuelin sat down at his desk and said, "Say, what's the matter?" ”

Murphy showed a flattering smile on his face and said, "Brother-in-law, isn't the Eternal Night spaceship already assembled?" I heard that the next launch will carry five astronauts into space, can you help me go to the old man's side and say something nice? You know, among our reserve astronauts, just me and Little Brand have no space experience. ”

Pang Xuelin shook his head and said, "This mission is mainly to detect the overall state of the Eternal Night, what are you doing there?" Is it holding everyone back? ”

"Brother-in-law!"

Murphy walked behind Pang Xuelin, leaned down while pressing his shoulders, and exhaled in Pang Xuelin's ear: "My test scores are at the top, why can't I be if others can?" ”

Pang Xuelin's body couldn't help but lean forward and said, "Don't get so close, it smells of sweat." ”

"Brother-in-law!"

Murphy said coquettishly.

Pang Xuelin said: "It's useless for you to find me to be coquettish, the reason why this mission is without you and Little Brand." It's because you don't have spacewalk experience! Each astronaut's mission requires more than 24 hours of spacewalk to complete, and the time in orbit is at least a month, and you rookies will have to wait at least until the Eternal Night passes the test before you can go into space. ”

"Hmph, no, no, no!"

Murphy was unhappy and turned around to leave.

"Wait!"

Pang Xuelin said suddenly.

Murphy turned around in surprise: "Brother-in-law, did you agree to speak for me?" ”

Pang Xuelin said: "Come home with me at night, you haven't seen your grandfather for a long time, you can't go on like this, anyway, it's a fait accompli, you go back and admit your mistake to grandpa." ”

"Okay."

Murphy couldn't help but roll his eyes, and he couldn't help but say weakly.

Murphy's choice to become an astronaut was met with strong opposition from Cromwell Oliver.

As a result, after this girl and the old man quarreled, she didn't go home for nearly half a year.

Pang Xuelin naturally will not let this situation continue.

Seeing Murphy's figure disappear behind the door, Pang Xuelin shook his head, picked up the astronaut file he got from Brand, and looked through it.

There are not many files left on Brand's side, about a hundred people.

Pang Xuelin soon found Cooper's relevant information inside.

Yuris Cooper: Astronaut, shuttle pilot, lost contact with NASA in 2040 AD, and his whereabouts are unknown.

On the information, there is also a photo of Cooper, who is the same age as the current Pang Xuelin, and is a middle-aged handsome uncle.

"Cooper!"

Pang Xuelin muttered to himself.

The space agency where he now works is located in the Mississippi Valley of North America, part of the Great Plains of the United States.

According to the state described in the movie, Cooper's location should be within a few hundred kilometers of the space agency.

It's just that in such a large area, it is not easy to find Cooper.

Today's human civilization is divided into autonomous regions, and has not formed a unified world government.

North American autonomous regions, East Asian autonomous regions, and European autonomous regions, coupled with the fact that the earth is now vast and sparsely populated, human settlements are scattered all over the place, and the civil affairs system does not carry out unified household registration management, trying to find Cooper is almost equivalent to looking for a needle in a haystack.

"However, there should be another way. In the movie, Cooper's daughter Murphy Cooper seems to be studying in a public school, and she only needs to check the public schools in the towns around NASA one by one, and she will definitely find Cooper! Okay, that's it! ”

Pang Xuelin slapped his thigh and made a decision.

The main purpose of finding Cooper is the attic of his house.

Hopefully, Cooper, who is trapped in the fifth dimension of time and space, will not only have his daughter in his eyes.

As long as he notices himself, Pang Xuelin believes that the other party will definitely send back the information he wants.

……

After finding Cooper's file, Pang Xuelin began to look through the research materials that Brand had copied for himself, which contained relevant descriptions of the nature of gravity.

In the late seventeenth century, Newton proposed gravitation, described gravity as an infinitely extending field, and explained the motion of massive objects, such as the Earth.

Newton even deduced a system of equations to solve the gravitational force.

Through this system of equations, it is possible to predict the motion of all things in the world, the cosmic stars.

Physicists once believed that Newton's gravitational pull was the end of physics.

However, in the late nineteenth and early twentieth centuries, the emergence of quantum theory, special relativity, and general relativity overthrew the edifice of classical physics built by Newton.

In 1915, Albert Einstein proposed the general theory of relativity, arguing that what we call gravity is in fact an aberration of space and time.

The Earth appears to orbit the Sun in an elliptical orbit, but in fact it moves in a straight line in curved space-time.

Einstein's theory of gravity was very successful in explaining the behavior of massive objects.

But a few years later, physicists opened up a strange new world: the quantum world.

This led scientists to discover that the other three fundamental forces that govern the universe are actually generated by the exchange of force-carrying particles: photons transmit electromagnetic forces, strong nuclear forces are transmitted by gluons, and weak nuclear forces carry particles such as W and Z bosons.

These have been rigorously proven by experiments.

Physicists, then, naturally ask, is gravity also caused by some kind of particle exchange?

To bridge gravity and quantum theory, physicists have proposed a completely new hypothetical particle, the graviton.

Although a graviton has never been observed in experiments, physicists already know enough about graviton.

First of all, since the range of action of gravity is infinite and the gravitational force decays with the inverse square law.

If you observe a massless particle with a spin of 2, then you have found a graviton.

So why hasn't anyone found the graviton yet? The main problem is that the gravitational pull is too weak.

For example, in a hydrogen atom, the electromagnetic force between an electron and a proton is 10^39 times stronger than the gravitational force between them.

A more visual example is the behavior of magnets and paper clips: a single magnet can defy the gravitational pull of the entire planet, attracting the paper clip.

If you think about it, you will know what this means, a magnet that you can easily hold in your hand pulls the paper clip up, and the gravitational pull of the entire planet pulls it down, and the magnet still wins.

This means that a single graviton is very, very weak, which makes some scientists think that it is almost impossible to detect such a graviton directly.

But in Brand's theory.

He had some new ideas for the detection of gravitons.

Gravitons may be detectable, which requires a whole new way of understanding the universe.

Brand argues that gravity only appears weak in this three-dimensional world in which we live.

But in reality, gravity can actually propagate to additional dimensions.

But these extra dimensions are curled so small that we can't perceive them in the three-dimensional world.

Now, let's imagine a taut rope that, for a tightrope walker, can only go forward or backward along the rope, and the rope is one-dimensional.

But for ants, they can crawl around along the perimeter of the rope, which looks two-dimensional.

For humans it is a one-dimensional rope, but for small creatures it is two-dimensional.

Quantum mechanics tells us that all particles are also vibrational waves, and physicists believe that gravitons can vibrate in these extra dimensions, which bend like bracelets around a slender wrist.

However, the cyclic nature of the extra dimension also imposes limits on how gravitons vibrate.

Only the wavelength of an integer can propagate uniformly in the extra dimension.

This has also led to some interesting results. Theoretically, there is more than one type of graviton in the extra dimension, and the wavelength of different integers is a different type of graviton.

The more vibrating the graviton can have mass, and such particles are called Brand gravitons.

At very small scales, Brand gravitons can have mass; But on a large scale, they become what the classical theory thinks is zero mass.

The problem now is that under macroscopic conditions, with the current level of human technology, there is no way to measure the existence of gravitons in a short period of time.

Unless a human enters a black hole or enters a high-dimensional space-time, the relevant parameters of gravitons are measured through high-dimensional space-time, and then the entire gravitational force generation mechanism is deduced through Einstein's gravitational field equation.

This is the dilemma facing Brand's theory.

And there is no hope of a solution in the short term.

After roughly understanding Brand's overall thinking, Pang Xuelin shook his head, he didn't have a good way to solve this problem.

Unless, in Cooper's attic, get the vital information that the future Cooper has sent back from the five-dimensional plane.

As for whether there will be something involved in the grandfather's paradox, it is not something that Pang Xuelin needs to consider.

……

The time of the day was fleeting, and at five o'clock in the afternoon, Pang Xuelin took Murphy, who had just finished taking a shower and finishing training, into a pickup truck, and then went to an elementary school ten kilometers away to pick up little Murphy in the car.

One big and one young Murphy made a lot of noise in the car, and in my memory, her daughter had been close to her sister-in-law since she was a child, which is why Chrissy named her daughter's English name Murphy.

Of course, Murphy Jr. also has an official Chinese name: Pang Fei.

It's just that the family has always called her Little Murphy since she was a child, and she has long been used to such titles.

When she got home, Chrissy had already prepared dinner.

Fish steak, corn salad with mashed potatoes.

Now in the world, only potatoes and corn, two staple foods, can still be grown normally, such as rice, wheat and other food crops, have long been completely extinct on the earth due to wilt.

Oliver didn't seem to care a little about Big Murphy's return, but from the corners of his slightly upturned mouth, he could feel that he was still very happy.

After all, they are both grandparents and grandchildren, and there is no overnight feud.

In the evening, Pang Xuelin took a shower and found a large-scale map of the United States from the bookshelf.

Then, with his space agency as the center of the circle, a circle was drawn within a radius of 500 kilometers and 300 kilometers.

According to the scene shown in the movie, Cooper drove to NASA for at least half a day, and with the current road conditions in North America, it is only 50 kilometers per hour.

Therefore, a ring of 300 km to 500 km is a reasonable interval.

It's just that even after this screening, there are more than 100 small towns with a population of more than 1,000 in this area.

Pang Xuelin was left with no good way, so he could only drive the car and find it one by one.

After determining the next work to be done, Pang Xuelin put away the map, and just as he was about to go to bed, he saw Chrissy wearing lace pajamas and walking out of the small room where Murphy lived next to him.

"My daughter is asleep?"

Pang Xuelin said in a low voice.

Chrissy smiled, "Asleep, husband......"

"Huh?"

"I kind of want it......"

Pang Xuelin blinked, stepped forward, and resisted Chriss.

……

The next day, Pang Xuelin went to the NASA to ask Brand for a three-month long vacation, and then began to drive along the path planned on the map, town by town.

It's not an easy job.

After arriving in a small town, Pang Xuelin first determined whether there was a baseball stadium in the town.

Because in the movie, Cooper once took his son and daughter to watch a baseball game.

In the process, there was also a sandstorm.

Therefore, if there is no baseball stadium in the town, Pang Xuelin can skip it directly.

However, baseball is very popular in North America, and even though mankind has experienced several catastrophes, the tradition of baseball is still well preserved within the boundaries of North America.

Therefore, nine out of ten of these towns that Pang Xuelin passed through have baseball stadiums.

After determining that there is a baseball stadium in the town, Pang Xuelin will go to the town's official in charge of education, show his work card, and ask the other party to cooperate with him to find the student file.

As long as the word Cooper appears in the student's surname, Pang Xuelin has to investigate them one by one.

After all, there are still more than ten years before the official start of the movie, and Pang Xuelin is not sure if Murphy was born.

But Cooper's eldest son, Tom Cooper, should have started school.

Fortunately, Cooper is not a big surname in the United States, and Pang Xuelin is not so difficult to find.

That's it.

One day

Two days.

week,

Fortnight.

January

Two months.

……

Pang Xuelin ran all over the 60% of the towns within the arc, but still found nothing.

At noon that day, Pang Xuelin drove into a small town called Nora, and just found the parking lot in the town, and in the distant sky, the yellow sand and smoke were billowing everywhere.

Pang Xuelin's eyes lit up, and he was not worried about the upcoming sandstorm at all.

Because the scene in front of him is almost exactly the same as the scene in the movie he remembers.

"This should be it!"

Pang Xuelin had a glimmer of hope in his heart, but soon, he got into the car again, and then under the guidance of passers-by, he found the mayor's residence.

Pang Xuelin took shelter from the sandstorm at the mayor's house for an afternoon, and it was not until the next morning, accompanied by the mayor, that he went to the town's public school to find information about students.

"Tom Cooper, it should be him!"

Pang Xuelin looked at the little fat dun on the photo in the student's file, and excitedly asked the principal on the side: "Is there an address to his home?" ”

"Tom? His house should be about ten kilometers northwest of Nora Town, and his father would drive him to school every morning, and today was the weekend, and the school was closed, or would you wait until tomorrow, when his father would drop him off? ”

Pang Xuelin shook his head and said, "No, I'm going to his house today." ”

The headmaster hesitated, looked at the mayor on the side, and said, "However, none of us have been to his house, only know a general direction of his house. ”

Pang Xuelin said: "It's okay to have a direction, I'll just drive over." ”

"Mr. Pang, don't you need me to arrange a person to lead the way for you?"

Pang Xuelin smiled: "No need, Mr. Robert, I've troubled you in the past two days!" ”

"Don't bother, cooperate with your work when we do our duty."

Pang Xuelin smiled, drove the pickup truck, which had long been eroded and dilapidated by the wind and sand, and drove in the direction pointed out by the principal.

After driving for more than ten kilometers, two houses appeared in the middle of a large cornfield.

In the corn field, there are many unmanned harvesters harvesting corn in the field.

Pang Xuelin drove the car and stopped in front of a house, and saw an old man cleaning up his belongings at the door.

Pang Xuelin rolled down the window and asked, "Is this Mr. Cooper's home?" ”

"Who are you?"

The old man wondered.

"I'm a NASA staff member and I want to talk to Mr. Cooper......"

The old man's face couldn't help but change, and he said, "There is nothing called Cooper here. ”

At this moment, the door of the house opened, and a handsome man was helping a pregnant woman in her thirties out of the house.

"Mr. Cooper, I've finally found you!"

Pang Xuelin got out of the car and came to Cooper.

"Who are you? What are you looking for me? ”

Cooper looked Pang Xuelin up and down, a hint of vigilance flashed in his eyes.

Pang Xuelin smiled and stretched out his hand and said, "My name is Pang Xuelin, and I am from the ...... of NASA."

"I'm not called Cooper, you're looking for the wrong person."

Cooper's face changed, and he helped his wife and walked into the house.

The old man hurriedly followed, and slammed the door shut.

Pang Xuelin was slightly stunned, stepped forward and knocked on the door: "Mr. Cooper, I have something very important to look for you, please open the door." ”

"Mr. Cooper......"

"Mr. Cooper......"

“……”

Pang Xuelin kept knocking on the door for more than ten minutes, and the door finally creaked open, and what appeared in front of Pang Xuelin was the muzzle of a long double-barreled shotgun.

"I told you, his name is not Cooper, if you don't leave, I'll shoot!"

The old man said impatiently.

"Good...... Good...... I'll go right away! ”

Pang Xuelin hurriedly raised his hands, slowly retreated, and came to the courtyard.

He then got into the cab and drove back to town.

In one of the upstairs bedrooms, Cooper and his wife stood at the window, watching Pang Xuelin leave.

"Honey, you're really not going to see him?"

Cooper shook his head, looked at his wife's bulging belly, and said with a smile: "No, I just want to be a farmer and wait for our child to be born." ”