Half-immortal civilization

One day...two days...

Everyone stayed in this desolate place for four days, and finally used the method of targeted drilling to extract the seven strange objects.These treasures exist at a depth of more than 700 meters underground.

However, seeing these seven objects, everyone was speechless!It really is a fossil!grass!It's a pebble!

After so many days of wasted work, just a few pebbles were dug out, which really makes people speechless!
Looking at the pebbles in front of me, they are no different from those on the earth. Of course, the iron content may be a little high, so it is a little reddish.It's just that it may be due to various natural reasons that make these pebbles a bit slender, coupled with the imperfect ray detection technology, and everyone's fantasy, this result is caused.

Now, looking back at the so-called seven strange places, after a rational analysis, I realized that these f*cking things don't look like fish!It must have been so exciting!

"Don't throw it away!" Seeing that Ding Shiyou was about to throw away these pebbles, Liu Haibo hurriedly stopped him.Nonsense, even pebbles are treasures!This is the most direct proof that water once existed on Mars for a long time.Although there are pebbles in the desert, they are definitely different from the pebbles in the water.This difference is clear to the eyes of experts.

In fact, ordinary people can judge it with a little understanding.The pebbles in the water are more delicate and smooth; they look fresh and translucent; while the pebbles in the desert are relatively pitted and "old".

The unreconciled team members used detectors to scan the bottom of the big pit unscrupulously, but still did not find anything of real value.Even in the sediment in those salt layers, no obvious microbial fossils visible to the naked eye were found.Of course, no matter what it was, everyone took away a full 100-jin specimen.Maybe, there will be more discoveries under the electron microscope, but at least they need to go back to the newly established base, and only Gong Chuanwei has an electron microscope specially for scanning microorganisms.

In fact, there is another simple way to detect the presence of microorganisms, which is to heat the sediment to see if there is water, carbon dioxide, alkanes, etc. appearing.But simplicity is relative and requires professional equipment.Obviously, Liu Haibo and the others don't have these devices.

"Keep going!" Liu Haibo's expression was also not very high, and the "archaeology" with high hopes turned out to be such a result.However, this is not so difficult to understand. The birth of life is not a simple accident or luck, there must be other conditions.For example, a long-term, stable natural environment lasting more than one billion years.Of course, this stability only means that there is stable liquid water.And Ceres obviously has such conditions!But Mars, which is in the habitable zone, does not have such conditions!

According to investigations, Mars suffered a violent impact at the beginning, and then because it was too small and had insufficient gravitational force, it cooled too quickly, resulting in no molten core and no magnetic field; under the various effects of small gravitational force, solar wind and solar radiation , turned into a dead star, maybe life simply didn't have enough time to evolve on this planet.

Three days later, everyone finally came to the position of 60 degrees north latitude. There is a cave at the outermost edge, which is the "bottomless pit" observed in space.These caves are very strange. Modern exploration methods are unable to gain insight into the situation inside.It seemed to be covered by a layer of fog.However, scientists also speculate that there may be a mixed "atmosphere" composed of gaseous methane, ice crystal carbon dioxide, and a small amount of water ice crystals, plus other reasons, causing this phenomenon.And the reason why those detectors lost contact shortly after entering the cave is probably because there are strong corrosive gases, or low-temperature liquids, and extremely low temperatures.

"Back five kilometers to set up camp. Send insect robots to check the situation at the entrance of the cave. In addition, link the spaceship to inform us of the current situation and let them help monitor the situation here."

Liu Haibo's order was strictly carried out.

More than 20 insect robots, large and small, have been released. The by-products of the intelligent research of these expert companies cannot be underestimated. The smallest is only the size of a finger, and the largest is no more than the size of an ordinary pigeon; but the detection capabilities of these things cannot be underestimated. .Carrying a wealth of instruments that ordinary people can't imagine.

Pooh!A spider the size of a fist protruded a silk thread, ruthlessly inserted into the ground, then spun the thread backwards, and slowly slid down.Don't be surprised, this is really a robot. The silk thread is a special antenna. Through the thin copper wire and the strong low-temperature resistant composite fiber rope, it hangs its own weight and slides slowly to the depths of the cave.Such a silk thread is 20 meters long, can withstand a low temperature of minus 170 degrees, and can hang a weight of ten kilograms.

The spider-like robot carries three instruments: infrared detection, micro X-ray detection, and exquisite optical detection.Soon, a fuzzy black-and-white three-dimensional superimposed picture appeared on the computer screen. The waves undulated slightly, and bubbles appeared, but the temperature was only about [-] degrees below zero!
It's... liquid methane!

Everyone looked at each other in blank dismay, and everyone thought about many possibilities, but they didn't expect that there was a piece of liquid methane here.The liquid methane is more than 70 meters above the ground, and the little spider cleverly climbed down against the wall.Of course, this way the antenna behind him falls off.But it doesn't matter, this antenna has another function, that is-to simply detect the head!This is a multipurpose antenna.

The antenna can simply measure the low temperature above minus 170 degrees; only a few minutes later, the specific news came, it really is liquid methane, and the temperature is around minus 105 degrees; in addition, after the adventure test of the little spider, it was found that The temperature at a depth of 15 meters has risen to minus 102 degrees; but when the little spider continued to crawl down, it suddenly lost its footing and fell into the cold liquid methane. After working for less than a few seconds, it was frozen.

Being able to withstand low temperatures does not mean that you are not afraid of freezing.

"Damn it!" Ding Shiyou exploded, "The walls around here are all covered with dry ice, and they can't hold a foot at all. Especially the methane is constantly evaporating, and a large amount of icy gas is rising, which has caused great trouble to the robot. Even if Even though it uses a diamond chip, it still can’t keep working for a long time at such a low temperature. No wonder all the previous detectors have problems. They are all frozen by low temperature and dry ice!”

As he said that, the remaining robots also fell down one by one, without bringing any news back, and just disappeared like this.

"Release the fish robot!" Liu Hai is calm, this is an adventure, and if everything goes smoothly, it will be suspicious!Although this kind of thinking is a bit unflattering, it is true in the expedition.There is no danger, often because all the dangers have been concentrated.

Soon, three "mechanical fish" were released.Specially treated fish can work well for two hours at such a low temperature.After two hours, I can only say goodbye to this world!