Chapter 214

Although the crawler chassis has many advantages and is more suitable for moving forward in the snow, the biggest problem of the crawler compared with the wheel is that the speed of moving forward is not fast enough.

In addition, the car itself is heavy enough, and the maximum speed it can run is only 80 km / h. even if Chen Xin overloads the engine, he can only run to 160 with twice the power.

The overload mode is used in an emergency. Chen Xin can't open it easily, and after the overload mode is opened, it will cause a huge loss to the track, engine, transmission device and even the car body itself, which can't last long.

Moreover, the theoretical maximum speed at that time could only be reached by running in a straight line on a flat and barrier free road. With the current complex road conditions and poor sight, Chen Xin's current speed is only 15 kilometers per hour, which is only the speed of the car, not the speed he travels on the map.

After all, in this kind of environment, the original roads are buried under more than one meter of snow, and the surrounding environment has long been beyond recognition. Chen Xin can't follow the original road at all. He can only determine his position by comparing the map while waiting for the UAV and radar to scan the surrounding road information, and then decide how to move forward.

Sometimes the straight line is only 100 meters, but because there is a big crater in the middle of the road, if you want to go around it, you have to walk several hundred meters more, which naturally takes a lot of time.

So it seems like a speed of 15 kilometers per hour. In fact, it's hard to advance 10 kilometers an hour on the map.

"Is there another crater? What's the number one I've come across today? " Chen Xin couldn't help complaining that through radar and UAV scanning, there was another crater with a diameter of more than 50 meters on the road ahead, forcing him to make a detour.

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

This section of the road, Chen Xin has not let the operating system to drive automatically, but holding the steering wheel, carefully forward.

Automatic driving is easy, but the intelligence level of the operating system Chen Xin installed on the car is not high enough. For road condition identification and route planning, only the car can pass through. So yesterday, when Chen Xin let it drive automatically, he rushed into the crater on the road several times.

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

If he can, he is willing to make a little more detour and go as flat as possible.

However, when it comes to craters, I don't think that although there are houses destroyed by meteorites in the urban area, craters are not very common.

However, after he came out, Chen Xin found that there were quite a lot of craters on the road. On average, he could walk for about an hour or two and meet one.

Most of these craters are tens of meters to hundreds of meters in diameter, most of which are formed by falling debris.

At the beginning, in order to prevent the meteorite from falling into the blue star, Lucia guided the nuclear bomb launched by the 5S to bombard the meteorite. Although it did not completely smash the meteorite, it also blew down a lot of debris.

Instead of falling directly to the surface of the blue star, the debris temporarily floated in low earth orbit, just like the space debris around the blue star.

Some of them will gradually fall to the earth's surface over time, and some will always float in low earth orbit. Most of the debris that fall on the surface of the blue star will burn up in the sky after burning in the atmosphere.

Even if the debris that can fall to the surface is not large, the crater caused by the fall is only a "small crater" of tens to hundreds of meters.

In fact, since the meteorite impact on the blue star, the dust formed by the meteorite impact in the sky has been falling continuously for more than half a year now. Although it is still dark and the sunlight can't penetrate, as time goes on, the dust is falling more and more, and the sunlight will eventually penetrate the clouds.

But this time may be very long. In a short period of time, the inland watch can only recover to the low light level environment, rather than the current dark environment.

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

Chen Xin took control of the steering wheel, bypassed the crater, and then switched to automatic driving mode again, which he thought about himself.

Sunshine is very important for human beings and life on the earth. It can be said that life only comes with sunshine.

Compared with cold, lack of sunshine is the biggest problem. After all, in the past, the temperature on blue star was not as low as minus 60 or 70 degrees in winter. However, even in cold Siberia, there are dense forests, so cold will not cause the extinction of life.

But without sunlight, most life would not survive.

So if the earth's surface can recover to a low light level, Chen Xin believes that even if the earth's surface is covered with dozens of degrees below zero temperature and ice and snow, there will still be traces of life slowly recovering.But the process of recovery 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 the whole ecosystem to be destroyed and the species to be almost completely destroyed. Even now, the global temperature drops to tens of degrees below zero. This extremely cold climate stage is called the ice age by scientists.

There have been two of the most famous ice ages on the blue star.

One occurred in the Pleistocene, about one million years ago, when human beings had just begun to evolve, because the orbit of the blue star around the sun changed, and the continental margin along the coast of the North Atlantic was covered with thick ice.

Another is that about 21000 years ago, most parts of North America and Europe were covered with ice as thick as 2km, which caused the sea level to drop by as much as 120m. The most brutal ice age in 500 million years affected at least 30% of the surface of Bluestar.

However, neither of these two glaciations is more dramatic and cruel than the global glacial events between 800 million and 550 million years.

Between 800 million and 550 million years ago, ice formed on the surface of the blue star from the poles to the equator. Only a small amount of liquid water remained on the bottom of the sea. At that time, the whole blue star was completely frozen, which was nicknamed "snowball Blue Star" by scientists.

As for the reasons for the formation of "snowball Blue Star", there are many reasons, such as the sun is blocked, the ice chamber gas is produced in large quantities, or the ice sheet reflects the sun.

However, no matter what the origin of the "snowball Blue Star" is, the surface of the blue star at that time was all covered by thick ice, only the ice layer in the equatorial region was a little thinner, maybe only a few meters thick.

So for the blue star itself, extremely cold climate is not a problem, for life, it does not make it completely extinct.

But for humans and other creatures living on the surface of the blue star, it is a natural disaster that can make everything extinct.

Nowadays, the surface of blue stars is rapidly cooled because of the sun's shielding. In addition, a lot of surface water has been evaporated by meteorite impact before. Under the influence of both phases, the surface has been covered by ice and snow, which is very similar to the environment of blue stars in the "snowball Blue Star" period.

In such a cold environment, even the ocean has to be frozen, and the whole planet has been frozen into a snowball before the dust dissipates and the sun shines on the surface of the blue star again.

That is to say, even if the normal light is restored, the temperature is still very difficult to rise under the reflection of ice and snow on the surface. The extremely cold weather may last for a long time, and this is very long, based on the blue star itself.

"It's really unpleasant!" Although it is no different for Chen Xin whether the extremely cold winter lasts for one hundred years or one million years, it is still a reality that it is difficult for people to have a good mood.

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

Maybe it will be a long time before human beings want to see spring flowers bloom again.

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

However, such a thing, even if we think deeply, should be the work of scientists, but it has no significance for Chen Xin himself.

Maybe in the future, with the help of the power of the system, he can create a planet reformer to transform the planet's environment, so that the ice and snow of the blue star will melt ahead of time, the environment will return to before the disaster, and even directly transform the blue star into Gaia, but this is the future.

For Chen Xin now, it's more practical to think about where to rest at night.

Looking at the map on the console and the records on the display screen, Chen Xin's driving mileage today is about 150 kilometers, but the straight-line moving distance on the map is less than 40 kilometers, so it can be said that he has not gone far.

The main reason why Chen Xin only walked a straight distance of more than 40 kilometers was that he had to turn back a long way to get off the highway and bypass the damaged section because of the damage to the viaduct on the highway.

This detour has undoubtedly delayed him a lot of time. If there is no detour, according to Chen Xin's estimation, he should walk 10 kilometers more in a straight line today.

However, in Chen Xin's view, he is not afraid of being slow, but of being unable to walk.

As long as we can move forward and walk slowly, we will arrive. But if the road ahead is blocked, that is the most troublesome thing.

After driving the car to a windy hollow, parking and putting down the eight hoes at the bottom of the car, Chen Xin left the cab and went to the life cabin to make dinner for himself.

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