Although the tracked chassis has many advantages and is more suitable for snow progress, the biggest problem with the tracks compared to the wheels is that they are not fast enough.

In addition, the car itself is heavy enough, and the maximum speed it can run is only 80 kilometers per hour, even if Chen Xin overloads the engine, twice the amount of electric energy can only make it run to 16.

The overload mode is used in an emergency, Chen Xin cannot be easily opened, and after the overload mode is turned on, it is a huge loss to the track, engine, transmission, and even the car body itself, which cannot last at all.

And at that time, the theoretical maximum speed could only be achieved by running a straight line on a flat and unobstructed road, and with the current complex road conditions and poor vision, Chen Xin now maintained a speed of only fifteen kilometers per hour, and this is only the speed of the car, not the speed at which he is traveling on the map.

After all, in this environment, the original road is buried under more than one meter of snow, and the surrounding environment has long been unrecognizable, so it is impossible to follow the original road.

Sometimes it is only 100 meters in a straight line, but because there is a large crater smashed by a meteorite in the middle of the road, you have to walk a few hundred meters more if you want to go around, and this circumference naturally takes a lot of time.

So what seems to be a speed of 15 kilometers per hour is actually very rare to be able to travel 10 kilometers in an hour on the map.

"Are there craters again? How many of these are you encountering today? Chen Xin couldn't help but complain, through the scanning of radar and drones, there was another crater with a diameter of more than 50 meters on the road ahead, forcing him to take a detour.

Although the off-road performance of the crawler is good, it is not impossible to drive down and climb the pit directly, but if there is a flat road, Chen Xin still doesn't want to climb the pit.

In this section of the road, Chen Xin did not let the operating system drive automatically, but held the steering wheel by himself and moved forward cautiously.

Although automatic driving is trouble-free, the intelligence level of the operating system installed by Chen Xin on the car is not high enough, and the identification of road conditions and route planning are only the car can pass, so yesterday when Chen Xin let it drive automatically, it rushed into the crater on the road several times.

Although relying on the climbing performance of the vehicle itself, these craters could not hinder Chen Xin's progress after being covered with snow, for Chen Xin, who was sitting in the car, the bumps caused by the vehicle's climbing crater were too uncomfortable.

If he could, he would rather take a detour and walk as flat as he could.

However, when it comes to craters, when I am at home, I don't think that although there are houses destroyed by meteorites in the city, craters are not too common.

But after coming out, Chen Xin found that there were still quite a lot of craters on the road, and on average, he could encounter a crater after walking for about an hour or two.

Most of these craters range from tens to hundreds of meters in diameter, and most of them are formed by falling meteorite debris.

In order to prevent the meteorite from falling into the blue star, Lucia guided the nuclear bomb launched by the Five Constants to bombard the meteorite, although it did not completely shatter the meteorite, but it also blasted down a lot of debris.

The debris did not fall directly to the surface of the blue star, but temporarily floated in low earth orbit, just like the space junk around the blue star.

Some of them will gradually fall to the surface over time, while others will float forever in low-Earth orbit, and most of the debris that falls on the surface of the blue star will burn up in the sky after being burned by the atmosphere.

Even the debris that can fall to the surface is not large, and the craters caused by the fall are only "small craters" of about a few tens to hundreds of meters.

In fact, since the meteorite hit the blue star, for most of the past six months, the dust formed by the meteorite impact in the sky has been falling continuously, although it is still pitch black, and a trace of sunlight cannot be penetrated, but as time goes by, the dust falls more and more, and the sunlight will eventually penetrate the clouds.

It's just that this time may be very long, and the surface will only be able to return to a low-light environment in a short period of time, rather than a light-free environment like it is now.

If the surface of the earth can be restored to a low-light environment, then the living conditions of human beings should be improved, right?

Chen Xin controlled the steering wheel, and after rounding the crater, he switched to autopilot mode again, while he himself pondered this question.

Sunlight is extremely important for human beings and life on the earth's surface, and it can be said that there is life only when there is sunlight.

After all, in the past, there was no shortage of winter temperatures that would drop to minus sixty or seventy degrees Celsius on the Blue Star, but even in cold Siberia, there were dense forests, so the cold would not cause the extinction of life.

But without sunlight, the vast majority of life would not survive.

Therefore, if the surface can be restored to a low-light environment, Chen Xin believes that even if the surface is shrouded in low temperatures and ice and snow by tens of degrees below zero, there will still be traces of life slowly recovering.

It's just that the recovery process will be very long, long enough to use a hundred years as a unit of calculation.

In the history of Blue Star, it is not uncommon for entire ecosystems to be destroyed and species to be almost wiped out, and even the current period when the global temperature drops to a few tens of degrees below zero is not uncommon, such an extremely cold climate phase is called an ice age by scientists.

Two of the most famous ice ages have occurred on the Blue Star.

One occurred about 1 million years ago, during the Pleistocene, when humans were just beginning to evolve due to changes in the orbit of the blue star around the sun and a thick layer of ice covering the continental margins of the entire North Atlantic coast.

In another case, about 21,000 years ago, much of North America and Europe was covered by up to 2 kilometers of ice, which caused sea levels to drop by as much as 120 meters, and this time the most brutal ice age in 500 million years affected at least 30% of the surface of the blue star.

But these two ice ages were not as dramatic and brutal as the global ice age events that occurred between 800 million and 550 million years.

Between about 800 million and 550 million years ago, the surface of the blue star was frozen from the poles to the equator, and only a small amount of liquid water remained on the seabed.

As for the reasons for the formation of the "Snowball Blue Star", there are many reasons why sunlight is blocked by the counter-blocking, or a large amount of ice greenhouse gas is produced, or the ice sheet reflects sunlight.

Regardless of the cause of the "Snowball Blue Star", the surface of the Blue Star at that time was completely covered by a thick layer of ice, only the ice in the equatorial region was slightly thinner, perhaps only a few meters thick.

So for the blue star itself, the extremely cold climate is not a problem, and for life, it does not mean that it will be completely extinct.

It's just that for humans and other creatures living on the surface of the Blue Star, this is a natural disaster that can wipe everything out.

Nowadays, the surface of the blue star is rapidly cooled due to the obscuration of sunlight, and a large amount of surface water has been evaporated by the previous meteorite impact, and the surface has been covered by ice and snow under the influence of both phases, which is very similar to the blue star environment during the "snowball blue star" period.

In such a cold environment, even the oceans have to freeze, and before the dust clears and the sunlight shines on the surface of the blue star again, the entire planet is frozen into a snowball.

In other words, even if the normal light is restored, it is still difficult for the temperature to rise under the reflection of the ice and snow on the surface, and the extremely cold weather may last for a long time, and this is very long, using the blue star itself as a reference.

"That's really unpleasant!" Although it makes no difference to Chen Xin whether the extremely cold winter lasts for a hundred years or a million years, it is still a reality that is difficult to make people feel good.

The long night may pass quickly, but the cold does not.

If mankind wants to see spring flowers bloom again, it may be a long time later.

Perhaps human beings can relive the old days by building greenhouses, but if they want to see the green mountains and green waters, blue skies and white clouds again, it will be a very long wait.

However, even if you think about this kind of thing deeply, it should be the work of a scientist, but it has no meaning for Chen Xin himself.

Maybe in the future, he can use the power of the system to create a planetary transformer, transform the planetary environment, make the ice and snow of the blue star melt in advance, and the environment will return to before the disaster, or even directly transform the blue star into the planet Gaia, but this is all for later.

For Chen Xin at the moment, it is more practical to think about where to rest at night.

Glancing at the map on the operating table and the record on the display screen, Chen Xin's driving mileage today is about more than 150 kilometers, but the straight-line movement distance on the map is less than 40 kilometers, so it can be said that he has not gone far.

The main reason why he only walked more than 40 kilometers in a straight line was that Chen Xin encountered the damage of the viaduct on the high-speed section, so that he had to turn back for a long distance before coming down from the highway and bypassing the damaged section.

And this section of the detour undoubtedly delayed him a lot of time, if there was no detour, according to Chen Xin's estimate, how could he have walked an extra ten kilometers in a straight line today.

However, in Chen Xin's view, if you are not afraid of slowness, you are afraid that you will not be able to walk.

As long as you can move forward, you will always get there if you go slower, but if the road ahead is not clear, that is the most troublesome thing.

After driving the car to a windswept depression, stopping and putting down the eight hoes at the bottom of the car, and fixing the chassis and body as much as possible, Chen Xin left the cab and came to the living cabin, intending to make dinner for himself.

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