The latest Martian spacesuit worn by Tang Feng is much lighter than the previous spacesuit. If the previous spacesuit was Iron Man's armor, then this new Martian spacesuit is Batman's batsuit

Because there is gravity on Mars, and it is necessary to take into account the frequent activities of astronauts on Mars, the design of this new Martian spacesuit is very reasonable.

Tang Feng quickly slid down the static rope to the bottom of the cave ten meters below. Of course, the bottom of this cave is not really the bottom of the cave, but this cave starts to slope down diagonally from this position, and Tang Feng is standing here, and his feet can already move freely.

Tang Feng looked at the multi-function watch embedded on his wrist, which showed that the temperature here was only about 3 degrees Celsius, about six or seven degrees lower than the temperature at the mouth of the cave. However, the wind here seems to be a little smaller than the mouth of the cave, and judging from the data displayed by the gas tester on the multi-function watch, the wind spewing from the depths of the cave does contain methane gas, but it is relatively thin.

Tang Feng took out a miniature life detector from space and stabbed it directly on his wrist. This miniature life detector can release specific beams to detect moving objects with signs of life. I just don't know if this thing is easy to use on Mars, but fortunately, it's not large, and it's not in the way when tied to the wrist.

Tang Feng held the strong light flashlight in his hand, and at the same time unscrewed the spotlight above his head, so that the spotlight on his head could rotate with his line of sight, and the strong light flashlight in his hand could expand the irradiation range.

The downward slope is almost forty-five degrees, which is relatively steep, and it seems that the ground here is quite smooth due to the strong winds that have been blown all year round, and one can slip if you are not careful.

The cave continues diagonally downward, and it is not known how deep it is. Tang Feng tied a slipknot with the static rope around his waist, and then walked down cautiously.

Without the help of the star core, Tang Feng really felt a little uncomfortable. If it were on Earth, Tang Feng didn't need to come down at all, he only needed to open the star core, then the situation under this cave would be clear at a glance. But on Mars, if you want to do this, let's wait for the star core split to completely control Mars.

After walking cautiously down for about five or six minutes, the originally steep descent became gentle, which made Tang Feng happy. At the same time, a faint "whining" sound came from the depths of the cave.

Tang Feng estimated that he had to walk down for about a hundred meters, but there was still no end in sight to the cave. And the temperature here is much higher than at the entrance of the cave, and the temperature here has risen to about 10 degrees Celsius before you know it.

"It seems that the physical conditions of temperature on Mars and Earth are similar, and this underground is really a good place to warm in winter and cool in summer. Supposedly, if it were by this time, the temperature outside would have dropped to about four or five degrees, but it was not that low here. Tang Feng thought to himself, and at the same time saw that the slope under his feet was getting flatter and smoother, and he couldn't help but feel a burst of joy.

It's just that what is the reason for that "whine" sound that is getting clearer and clearer? Listening to the sound, it should be the whistling sound caused by the wind passing through the small cave, but this place is so spacious, how can there be a small cave?

Tang Feng continued to walk forward for two or three minutes, and the cave in front of him had completely changed its appearance, and the cave seemed to have bottomed out here, because the ground of the cave here was very flat, and it no longer looked like it was extending downward. Moreover, this place is many times wider than the entrance of the cave, and even with the illumination distance of the strong flashlight in the hand, you can't see the edge of the cave. However, the top of the cave can be seen clearly, and it is about seven or eight meters above the ground.

This made Tang Feng sound the underground space he saw under Vincent Peak in Antarctica, but compared to the underground space opened up by Old Man Andro, this is undoubtedly a naturally formed underground cave.

Because it was on Mars, Tang Feng didn't dare to take out the generator, halogen lamp or anything, but left a stop LED light in the same place, and then with this small light as the center, Tang Feng began to walk to the right.

Tang Feng estimated that he had walked more than one hundred and fifty meters before he saw one side of the cave.

The "woo" sound here was louder, and when Tang Feng walked to the wall at the edge of the cave, Tang Feng realized that there were some large caves like washbasins and small ones the size of an adult's fist on the wall that extended to the darkness in the distance.

These small caves are all over the side walls of the main cave, and those "whine" sounds come from these small caves.

Obviously, the main cave should end there, but from this place, there are smaller caves that lead to unknown depths underground. As for where these little caves lead, no one can figure out. The fault is that the star core split completely controls Mars.

However, the rock walls in front of him and these small caves also allowed Tang Feng to roughly guess the origin of these small caves and this big cave.

This is an extremely typical underground space formed by volcanic activity. In ancient times, the Alcia volcano next to it had a large eruption, which was many times more violent than the earth's Yellowstone volcano, turning the area into a world of lava.

Under high temperature and pressure, the Martian crust in this area becomes soft as butter, so some volcanic gases can easily break through the shackles of the Martian crust, and rush out of the Martian crust from a depth of unknown kilometers underground, forming a huge magma channel here.

In other words, this main cave should have been created by the eruption of volcanic gases.

Then, a small stream of magma also tried to rush out of the surface of Mars through this gas channel, but because the main crater of Alcia Volcano erupted too violently, the pressure of the underground magma sac was not enough to support this small stream of magma to rush out of the surface of Mars.

As for these small caves in the rock face, they must have been caused by the volcanic gases that rushed out of the ground before that small stream of magma cooled. Because the entire gas channel is blocked by magma, these volcanic gases cannot be rushed out in one go, but can only be differentiated into one stream, and where the magma that has not yet cooled is soft, it will rush out from there, and finally form these small caves.

In fact, this situation can be seen near the earth's volcanoes or in craters, and Mars is basically no different from the earth in other aspects except that it is smaller than the earth. Volcanic eruptions in ancient times are estimated to be no different from volcanic eruptions on Earth. (To be continued.) )