Mark has never done geological work, and he doesn't like to explore, the deepest place he has ever been to is probably the underground parking lot, the first time he approached such a deep underground, he felt a deep sense of depression, the oxygen in the oxygen tank was still sufficient, but he already felt out of breath, his vision was full of intricate passages, some were just lines on the rock wall, and some were real gaps that people could pass through.

Before he knew it, Mark had the illusion that he had become smaller, that he had fallen into an ant nest and that he would never be able to escape, and that knowing that there were no ants on the moon could not stop him from thinking wildly.

"Well, Dr. Geography, do you know what caused this environment?" Mark asked.

"I didn't study geography, I studied geology." Nina gave him a blank look.

"What's the difference, do you know how to get out anyway? I've been dizzy. ”

"This geological phenomenon is called the Moon River, I have seen it before, and no one can explain why it formed, maybe there was really water on the moon, and then it dried up, leaving this kind of pipe-like riverbed." As she walked, Nina knocked around the wall with a manuscript, leaning on it from time to time to feel the vibrations, and she couldn't transmit sound in the vacuum, but after working on the moon for so long, Nina had long learned to rely on the vibrations to confirm the formation.

"How is this possible...... Is there any possibility of water in this environment? ”

"Of course not, but there are always incredible miracles in nature, who knows?" Nina shrugged.

In order to avoid being frozen to death, Mark dismantled the lunar soil detector, the coil inside can be taken out to make a simple heater, and the power supply of the protective suit can be temporarily kept heating after being connected, relying on these two fist-sized heaters, the two people gradually eased up from the cold, Nina didn't think of any good way, she probed into a relatively thin ground, but this "relatively thin" is relative, which is also almost ten meters thick, and it can't be dug up by two small manuscripts.

Just when they were about to fall into despair, suddenly the contact in Mark's hand rang! It's Sun Tan!

Mark excitedly took out the antique receiver, turned on the mobile phone, and opened the codebook with a little desperately saved electricity, Sun Tan's message this time was also very simple, that is, he had escaped, and asked Mark to report the location to him, Mark wanted to cry without tears, and sure enough, at this time, it was still the most reliable.

"I'm at Tranquility Sea One Mine! The ground sank when the lunar soil was mined, and I'm now trapped underneath, and I don't know where I am. Mark used the code to tell Sun Tan about his situation, and the other party was silent for a while, and soon sent a reply.

"I can detect where you are with long-wave positioning, can you find a place close to the ground?"

"There is one place, but it is very thick, almost ten meters."

"No problem, you wait nearby, don't get too close, it's about fifty meters, I'll go and save you right away."

Hearing Sun Tan say this, Mark's heart immediately relaxed, sure enough, this guy is very reliable at a critical moment, never drops the chain, and Sun Tan hates ink very much, and he will act on it as soon as he has an idea, which is both a good thing and a bad thing, but it must be a good thing for Mark now, and he may go crazy a few hours later.

"Okay, you're looking for it, let's go back to the place just now and wait, I contacted someone to save us." Mark patted Nina on the shoulder.

"How is that possible...... The communicator simply doesn't work here. Nina glanced at Mark suspiciously, worried that he had gone insane out of despair, but he looked good.

"Really, I have a special communicator in my hand, and the help will come soon, so let's not waste our energy." Mark showed the receiver to Nina, and the two of them were also people who had experienced life and death together, and he didn't hide it anymore.

"Alright then, I hope so." Nina couldn't understand what it was, she didn't know much about communication technology, but it was indeed a waste of energy to continue looking, so she followed Mark's advice and went back to the place just now to rest.

While waiting for Sun Tan's arrival, Mark and Nina chatted for a while, and Nina said that it was called Moon River, but it was also mentioned in gypsy legends.

This story has also been passed down from generation to generation by their people, the gypsies are good at divination, chanting epics and training beasts, and they will carefully pass on each story to their descendants, they have almost no cost of historical records, most of them live in the corners of other people's history books, and their own stories are passed down by word of mouth.

Nina told this story about their Great Prophet, she didn't know what the man's name was, only that everyone called him the Great Prophet, he was a crazy drunken old man, but what he said came true. At that time, the Ottoman sultan was distressed by the attack on Constantinople, the city wall of Theodosius, which was known as unfortunate, was impregnable, and the Ottomans spent a lot of manpower and material resources to break through it head-on.

During the war, a gypsy caravan was captured by the Ottomans as spies, and the great prophet came from afar to testify for them, and Sultan Mehmed II asked him whether Constantinople had been captured in the end, and the prophet replied that it had fallen, but the city was not slaughtered, and the people and churches in the city left by the Sultan prospered for a hundred years. When Mehmed II asked him how he had won, the great prophet went mad, drank and stripped himself of his clothes and fell on the ground, shouting that he was swimming, and that the water in the Golden Horn was too cold.

Everyone was shocked, and the guards were about to behead the prophet on the spot, but Mehmed II stopped them, thoughtfully lifted the old man, ordered the release of the seized caravan, and gave them a generous gift.

A month later, the Ottoman Sultan Mehmed II bribed the Genoese, wrapped the ships in pine resin, and advanced the Golden Horn from land, a dryland boat that broke the Byzantine defenses and the Ottomans succeeded in storming the city that would never fall.

After that, the Ottoman Sultan did not forget the words of the prophet, he did not slaughter the city, treated the surrendered Orthodox Christians kindly, and kept the Hagia Sophia.

"The great prophet has more than once woken up in a dream, and cried out that there is a great river on the moon, and that the silver rivers are surging, and the rivers are surging, and the stars are falling." Nina thought back to the epics her parents had taught her, and even though they spanned hundreds of years, even though they were no longer on a planet, they were so vivid that they had not faded by any factor, "When the stars shift, the moon shines, and all things and the stars are in the middle of it...... Silently homecoming. ”