Gogarin laughed and continued: "Penguins run slowly and are covered in meat, so why don't hungry polar bears eat baby penguins?" ”

As soon as Gao Garin said this, everyone was immediately at a loss.

"Don't polar bears eat penguins?"

"I don't know! I'm not an animal expert! ”

"Is it because there are too many penguin hairs and polar bears are biting into trouble?"

"If you're hungry, who cares about trouble!"

"That's right, why is that?"

……

Everyone turned their attention to the old man, and he could answer every question.

"Huh!" The old man smiled, pointed at Gao Garin and said, "You bad boy, you will fool people." Polar bears must be in the North Pole, penguins are only found in Antarctica, so how can polar bears eat penguins when they are so far apart? ”

Gao Garin also smiled, "The old man is really knowledgeable, come, please listen to the question!" ”

"Xiao Ming's father has three sons, the eldest son is called Dabao, the second son is called Erbao, and what is the name of the third son?"

"You are going around me, the third son is naturally Xiao Ming!"

The old man replied quickly, and someone next to him muttered: "I'm so stupid, I almost said that the third son is the third treasure." ”

Gogarin continued, "Three people were playing mahjong in the room, and the police came and took four people away, why is that? ”

"Young man, you're going around me again, the fourth person is mahjong, and mahjong is a person's name."

The old man reacted quickly, not like an old man who was close to the age of sixtieth, which made Gao Garin amazed.

"Three Jin are called Xin, three water are called Miao, and three people are called Zhong, so what should the three ghosts be called?"

Gogarin's question was too much of a brain teaser. The old man didn't come up with it for a long time, and someone put the three ghosts together to write a word, and found that he didn't know him.

When the old man saw the grinning face of the thief, he immediately reflected, "Three ghosts! , the three ghosts should be called help! ”

As soon as he said this, the crowd burst into laughter.

The old man shook his head and said, "Young man, you are fooling people with these questions. You've got something to say! ”

Gogarin pretended to have a serious expression, "Well, I'm going to have a very serious question now, a bear fell into a pit 19.66 meters deep, and it took two seconds to finish. ”

When everyone heard it, it was really a very serious question, but after Gao Jialin finished speaking, he suddenly changed his style and asked a question: "Then what color is the bear?" ”

The crowd was in an uproar.

"This young man is messing around again, what does this have to do with what color the bear is!"

"What a very serious question, and it's fooling people!"

……

At first, the old man thought it was fooling, but suddenly he thought, no, there must be a mystery in this question!

He did a quick math in his head, and suddenly said, "Young man, the bear is white, isn't it?" ”

Gogarin gave a thumbs up, "Awesome!" Old man, you can figure out such a difficult question at once! Admire! Admire! ”

Here they were praising each other, but everyone wondered.

"There is an answer to this question?"

"Why not a white bear, can't a black bear?"

"I don't see the logic at all!"

……

The old man unhurriedly announced the reason, "Everyone, this question tests some professional knowledge, mainly the problem of gravitational acceleration. 19.66 meters, two seconds to the bottom, according to this value to calculate the gravitational acceleration is 9.83. There is another knowledge point below, that is, the gravitational acceleration is different in various places on the earth, and the equator is the smallest and the poles are the largest. This is because the Earth rotates, the equator rotates the fastest, the poles rotate the slowest, and the force of rotation cancels out a little gravitational acceleration. So the acceleration due to gravity of 9.83 is only produced at the poles. We also know that only the Arctic has bears, and that is the polar bear. So it must be a polar bear that falls into the pit, and polar bears are white. ”

When the old man said this, some people understood, and some people still didn't understand it too much. However, this belongs to its own foundation is too poor to be recovered. For example, Liu Qiaozhen is dizzy to hear.

Gogarin applauded, "Old man, you are really amazing, I am stumped by this question, and many people have not answered it." You were the first to answer, admire and admire! I would like to ask what you do? How can you understand everything about astronomy and geography? ”

The old man smiled and introduced himself: "Contemptible Li Yuan, who now works at the Purple Mountain Observatory in Nanjing, can be regarded as an astronomy enthusiast. ”

"Li Yuan? This name is so familiar! Gao Jialin's mind quickly turned, and suddenly he remembered, and couldn't help but exclaim: "You are Teacher Li Yuan, a famous astronomer, a popular science writer, and "Astronomy Garden Collection" and "Traveling to the Universe" are your works. It's great to meet you! ”

Li Yuan is a well-known astronomer in China, an author of astronomical science popularization, his life has been dedicated to the cause of astronomy and popular science, and he is a literary predecessor that Gao Jialin admires very much.

Li Lao was a little surprised, the young man could tell his own situation, but he obviously didn't know him!

"What do you do, young man? How can you remember my old age? ”

Gao Jialin hurriedly introduced himself, "Mr. Li, my name is Gao Jialin, I can be regarded as having written something, and now I am a farmer in northern Shaanxi. I also like astronomy very much, and I have read your popular science articles, so when you just said your name and unit, I immediately remembered it. ”

"Gogarin, writer?" Li Lao thought about it for a while, and immediately remembered: "Oh, you are very modest!" The author of "Yongquan", a great writer! And the magical novel you published in "Juvenile Literature and Art", my granddaughter also likes it very much! ”

"Huh!" Gao Jialin scratched his head a little embarrassedly, "Mr. Li, you have exalted me, I just happened to write a novel to correspond to the facts." You have been doing astronomical science popularization work for decades, which is admirable! ”

The two of them revealed their identities like this, which immediately caused a commotion. The people next to him suddenly realized that these two writers, a writer and an astronomer, are both great cultural people, no wonder the jokes are so interesting. Some people have also read "Yongquan" or "Birds and Fish", so they took the book to sign it, and Li Lao also surrounded a few fans.

Gogarin, who already had some experience with this kind of thing, signed his autograph and loudly called for "everyone to be quiet, keep order, and don't cause trouble to the conductor." In this era, people who rode trains were generally people with some status, but his proposal was immediately accepted, and after Gogarin signed dozens of copies, the crowd slowly dispersed.

"I'm so embarrassed! Mr. Li, it has affected you! As soon as Gao Jialin was free, he immediately apologized to Li Lao.

"Hehe, it's okay!" Li Lao was very tolerant, "I didn't expect you, a young man, to be quite experienced in dealing with this kind of thing!" ”

"Alas, I don't know how it's become popular lately. So taking your lover out, on the one hand, is a business business, and by the way, it is also a travel and a clean escape. But most people don't recognize me, hehe. Gao Jialin explained a few words with some self-deprecation, and talked to Li Lao again.

"By the way, I happen to have some astronomical questions, can I ask you for advice?"

Gao Jialin looked at Li Lao, and suddenly had an idea, taking out the part of Ye Wenjie in "The Three-Body Problem" separately, filling in the content, and forming a novella, which is quite interesting. However, in this way, the content of this part must be detailed and deepened, so as to reflect the tragedy of the times and the collision of human nature.

Of course, if you want to write like this, you will have to write more about astronomy and observation, and Gogarin does not understand this. But there happens to be a great god in front of you, so you can ask for advice.

Li Lao himself is engaged in astronomical research and popular science, and when someone asks him about astronomy, he is naturally willing to answer.

"Hehe, writer Gao, I didn't expect you to have a hobby in this area. Well, anyway, if you have nothing to do on the train, just ask if you have any questions. ”

Gogarin thanked him, took his notebook out of his bag, and began to ask.

"Mr. Li, I would like to ask if our country or other countries in the world have any plans to detect aliens? For example, get a super large and super strong antenna to receive electromagnetic waves from aliens, or send electromagnetic waves to aliens? ”

"You say that this is true, but our country does not have it, and foreign countries have it. ......" Li Lao talked about his professional aspect, and immediately talked about it.

As he listened, Gogarin's pen flickered, recording non-stop.

After asking how to detect aliens, Gogarin asked in detail what a large-scale detection antenna looks like? How much power is needed to carry out a detection, what kind of instruments are needed, and what is the current situation in our country?

After Li Lao patiently answered one by one, Gao Jialin asked about the three-body star system in the constellation Centauri, what kind of operating state is the three-body star? Can the laws of the stars be predicted? Can there be life in such a star system, can there be civilization? What might the life that emerge look like?

Gao Jialin's questions, Li Lao can answer most of them. There are some things that are too advanced or too fantastical, such as the two-dimensional expansion of protons and the strong interaction force of water droplets, Li Lao can only say that this may be possible, but there is no theoretical basis at present.

Gao Jialin asked in detail, memorized a full book, and asked Li Lao to recommend some related books to him.

Finally, the exchange was almost over, and Li Lao was almost at the station, and he asked a question before getting off the train: "Xiao Gao, are you planning to write a book about aliens?" ”。

Gogarin nodded, "I'm going to write a story about an intellectual youth who was in turmoil and almost destroyed all of humanity. I've just had an idea now, and there's a lot to come. In particular, I don't know much about the content of intellectual youths going to the countryside. ”

Li Lao smiled and said, "That's good, in fact, sometimes your professional writers are engaged in popular science, which is far more influential than us scientific and technological workers. ”