Thinking like this, looking at the colleague next to him, he had already drunk tea and chatted with Zhou Gong.

Zhou Nan looked out of the window boredly, the car was driving on the highway, the mountains on both sides were close at hand, but not very high, the unknown mountain flowers on the uphill were blooming, the exposed rocks were brown, and the clouds could be seen on the top of the mountain, floating slowly. There were birds flying by from time to time, and the sky was very blue and blue, like pure and transparent sapphires.

Zhou Nan likes this feeling, and he has always hoped to have a yard of his own on the hillside. The yard and the house are made of stones, the gate of the yard is made of firewood, that is, the firewood in the poem, and some crops are planted in the open space outside the yard, and there is no need to cultivate intensively, as much as it can collect; Plant some green onions, leeks, garlic, and shallots in the open space in the yard, and there are two peach trees and two jujube trees. In the courtyard, there is mountain spring water that is drawn down from the mountain, which flows from outside the stone wall, through the courtyard, and flows from the other corner of the stone wall. The walls of the stone house are plastered with white plaster, and the kang is the kind of warm kang that can be heated in winter. In the middle of the house is a clay pan stove, inside is a prosperous charcoal fire, and an iron kettle hangs from the stove, boiling water to make a cup of camellia. There was a round table in the room, and a few wooden chairs, which were simple but sturdy tables and chairs with simple mortise and tenon joints. There was a sheepskin lamp on the wall, lit at night, with a dim yellow light, burning time, and accompanying him through every lonely night in the mountains. There was also a strung bow, a crossbow, and a single-barreled shotgun on the wall. A short knife is hidden in a leather sheath. He thinks this kind of life is suitable. But his girlfriend said to him, "If you want to live by yourself, I won't go." ”

The feeling of boredom and monotony in the car invaded with drowsiness, and he closed his eyes slightly. Suddenly, a soft voice next to him asked, "Do you believe in crossing?" He opened his eyes and saw a little girl of fifteen or sixteen years old beside him, her eyes were big and clear, and she was blinking and blinking.

"Are you asking me?" He is very strange, he thinks that all little girls should be the kind that is very shy and shy, should be very rich in heart but very introverted on the outside, and will not take the initiative to communicate with strangers. When he asked, he turned his head to look, and at this time only he and the little girl were holding their heads up, and everyone else was drowsy, no wonder the little girl spoke softly.

"How can you ask such a strange question? Do you wish you could cross over? He didn't answer directly.

The little girl raised the mobile phone in her hand and said: "I see that many people are discussing this, and even many scientists are researching it, but I don't want to cross, at least I don't want to cross unreliable." "Little girls obviously can't be classified as introverts, they talk a lot," Hawking said, adding that the wormholes are all around us, but they are too small to be seen by the naked eye. Everything in the universe has small holes or cracks, and this basic law also applies to time. There are also subtle cracks and voids in time, and voids smaller than molecules and atoms are "quantum bubbles", and wormholes exist in "quantum bubbles". Or to use the original theory, it is close to the speed of light, or close to the super gravitational field. These can be scientifically and theoretically allowed us to cross ah. The little girl's face was full of longing.

For these unrealistic things that are ahead of my time, I deal with them with wild idle nonsense: "Molecules and atoms are already very small, how can the wormhole smaller than the atom be discovered and found, even if someone finds it, how to mark this wormhole in the trillions of atomic worlds?" Also, when you find a wormhole, how do you stuff yourself into a wormhole? How long do I need to lose weight? ”

"That's right, it's hard to find a time gap like a wormhole, and then use super strength to open it, it's like telling a mythical story." The little girl frowned, as if she had found the wormhole, but there was no way to open the door of this space-time.

I couldn't bear to look at such a cute little girl, so I began to follow the temptation: "Methods like looking for wormholes, black holes are impractical, wormholes are too small, and black holes have super strong gravity, which may pull you somewhere." The reliable way is to build a spaceship, the spacecraft should be loaded with enough fuel, and after takeoff, it will start to accelerate, so that it can reach the alien sky in about 7 days, and it can reach half the speed of light in two years, and it will reach 90% of the speed of light in another two years, and four years after launch, the spacecraft will begin to travel through the future, and every hour on the spaceship will pass two hours on Earth. After another two years of acceleration, the spacecraft will reach its maximum speed, which is 99% of the speed of light. At this rate, a day on a spaceship is equal to a year on Earth. This way it is possible to travel to the future. ”

Such a specific hypothesis with data is more convincing, the little girl nodded, "In fact, the time spaceship theory has been enthusiastically discussed decades ago, and the more cutting-edge the theory, the more varied, and no one will accept anyone." Hawking also believes that even if it really exceeds the speed of light, it is impossible to really travel through time and space, and that time reversal is just an illusion, and that faster-than-light events will cause a series of quantum mechanical reactions in time and space, which will eventually make it impossible to travel through time and space. Of course, there are also those who disagree, saying that there is not only one way to travel through time and space. Like the Bermuda Triangle, people can't explain where these planes and boats come from, or where the things that disappear in the Bermuda Triangle go. ”

"yes, that's what the scientists say, you can only travel to the future, right?"

"Maybe there are people or things that have disappeared and they have traveled to the past, but we can't travel to the past, so we can't find these missing people or things in the past." Maybe I was attracted to this topic and developed my imagination like this little girl.

"Then why do all the time-traveling dramas on TV travel to the past? Why do so few travel to the future? The little girl finally stopped talking about the theories she saw on her phone and began to talk about popular topics.

"That's because the story of traveling back in time is well choreographed, it's like decorating a house in a ready-made room, you can decorate it as you like, and the house won't collapse; If writing travels to the future, it's basically about building a house yourself and then renovating it in it. Which do you say is simpler and less mindless? ”

"Why do people like to cross?" The little girl threw out another question. It seems that the little girl was going to ask about the arrival of the car.

"This question ......" is really difficult for a fourteen or fifteen-year-old girl to understand. Just like the people born in the 70s, for that generation, it is the world of heroes such as Jin Yong and Gu Long, everyone has a martial arts dream in their hearts, and they have imagined that they are the heroes in that world, controlling their own destiny and dominating the trajectory of this world. Now the post-80s generation is no longer a martial arts dream, but has transformed the martial arts dream into a travel dream. Traveling through the past, it is a broader world than the dream of martial arts, as long as you travel through the past, what Tang poems are 300, what poems and songs, what modern science and technology, industrial inventions, casually that are invincible existence, and the eighteen palms of the dragon or something, that are all weak.

In fact, martial arts dreams and crossing dreams are both a kind of dream, a kind of dream, representing an unstable setting of a person's heart for the future. But at least it represents the truth, goodness and beauty in people's hearts, because no one dreams of being a bad person that everyone hates.

"Aren't you afraid I'm a bad person?" I change the subject. "You're a cop, how can you be a bad person?" The little girl said indifferently. "Huh! You little sister, guess accurately?! ”

The little girl was amused by the lame Henan dialect I had learned, and said, "My father is also a policeman, and I will know it when I see your pants." ”

I was amazed at the delicate eyes of the little girl. In addition to studying, today's children are mobile phones and TVs, and it is rare to have such observational power.

At this time, the front of the highway was cut off by a large mountain, and two large semicircular caves appeared in front of the road. The Stagecoach Road Tunnel has arrived.