"Leaving this planet?"

"What disaster have you encountered?"

Although Yang Meng has a lot of problems at this time,

But one of the things that puzzled him the most was what happened to the civilization on this planet.

Plagues, wars, and even climate change, meteorites hit the ground......

All the dangers of the world that he could think of went through his mind,

But that's the case,

He couldn't be sure what kind of crisis was destroying the civilization here.

And hearing Yang Meng's inquiry,

The flickering frequency of the light points that had been constantly flickering has slowed down,

Xiaoguang was silent for a while, and a voice that seemed to sigh sounded in his ears:

"Our civilization has existed for too long,

long enough to deplete the planet's resources,

In that last period of time, I couldn't leave this planet with all my might,

During that time, the whole clan was filled with despair,

You will not be able to understand our demise ......"

"Running out of resources!"

Yang Meng, who had imagined all kinds of disasters, never expected it,

The civilization here starved to death on this planet.

Although the result of this decline of civilization sounds very exaggerated,

But human beings have also worried about this situation,

If the gravitational pull of the earth was a little greater,

The rocket needs to reach a little higher cosmic velocity out of the gravitational pull of the planet.

If there is no two-level hegemony that leads to the rapid development of aerospace technology, and mankind has been in the steampunk era of infighting,

Can the earth's resources be enjoyed by human beings forever?

Some images appeared in Yang Meng's mind:

"The resources are getting less and less,

But there is no other way to get it,

An entire civilization was slowly starved to death

What an end times it would be! ”

Compared to being hit by a plague, a war, or a meteorite, the kind of disaster that destroys a civilization in a short period of time,

The result of this "starvation" is inevitably the most painful process of civilization disappearance.

"But how can the resources on a planet be consumed so easily?"

Yang Meng is still a little skeptical about Xiaoguang's statement,

You know,

Back in his grandfather's time,

Humans can already use carbon monoxide and carbon dioxide to synthesize starch and fat.

In their time,

There is also a Northwest Wind Life Support Device, as long as you drink the wind, you can eat a full stomach.

Therefore, the resources on the entire planet, with the support of certain recycling technology, can form a conserved closed loop.

There is no need to worry about a resource crisis.

With the technological level of this civilization he currently sees,

It is perfectly possible to achieve this self-circularity,

But why did he starve to death in the end?

Yang Meng told the light point of doubt about this doubt.

"Our civilization does have such a circulatory system,

Otherwise we wouldn't have existed for so long! ”

"But our civilization is different from yours after all,

I don't know if you noticed,

The heavy elements on this planet are extremely rare?! ”

Hearing this, Yang Meng nodded,

This problem was discovered when Xiao Yi analyzed the material of this planet before,

On the periodic table, the heavy elements after iron are extremely scarce on this planet.

He didn't quite understand this situation at first.

And now I hear Xiaoguang ask,

He suddenly thought of a possibility:

"Could it be that the heavy elements on this planet have been consumed for a long time?"

But Xiaoguang's next words surprised him again:

"I've been saying you're lucky to have a planet like that!"

"And our planet has a congenital problem!"

"Congenital problem?"

"Yes! How many years has your planet existed? ”

"About 4.5 billion years!"

"4.5 billion years?" Xiaoguang doesn't understand the way of human timekeeping,

But with the help of Xiao Yi,

Xiaoguang still understands how long this is,

And in the ensuing conversation,

The timing numbers that Yang Meng heard and said would be transformed by Xiao Yi's translation.

With Xiao Yi's help, Yang Meng and Xiao Guang can be unified on the issue of time.

Although Yang Meng didn't know why Xiaoguang asked about the age of the earth,

But he still listened carefully:

"And what do you think is the age of the universe?"

"About 13.8 billion years ago!"

"Hmmm! That's about the same as what we've been observing for a long time! ”

"Since you can also calculate the age of the universe,

Then you must have calculated how long Rutan has existed, right? ”

"Rutan's age!"

Yang Meng nodded

According to human calculations,

The age of Rutans is about 70 to 9 billion years. Such an age is almost twice that of the solar system,

Although it is not as old as Barnard, which is the second closest to the Sun,

But it's also an older star.

But even at such an age,

At the fusion rate of red dwarfs, they can live for about 12 billion years.

"Wait, red dwarfs, heavy metal elements form ......"

Before Xiaoguang could continue to explain, Yang Meng had already reacted to something.

"Could it be related to the formation of galaxies?"

In the universe, the formation of heavy elements has a lot to do with supernova explosions.

The solar system is only a middle-aged star system for the universe.

In the more than 9 billion years from the emergence of the universe to the formation of the solar system,

According to the theory of stellar structure evolution,

solar system

Most likely, after the explosion of the last generation of solar supernovae,

The remnants of the gas dust accreted again to form new stars,

According to the theory that the greater the mass of the star, the more intense the fusion reaction, and the shorter the stellar lifetime,

In the billions of years before the solar system,

may have gone through several explosions, the process of aggregation,

to create the current solar system.

This is also one of the possible reasons for the abundant heavy element resources in the current solar system.

And the Rutan star has a long life and a very small mass,

This means that the gas dust that formed this star,

Probably left over from the explosion of a low-mass supernova.

This makes the heavy elemental resources in this star system inherently very scarce.

"So there is still such a situation?"

At this time, Yang Meng still wanted to determine something with Xiaoguang,

But suddenly something unusual appeared in the space they were in.

I saw that huge ball of light,

After a few quick flashes,

It began to shrink slowly,

In this case,

Xiaoguang on the side suddenly reminded loudly:

"I know you still have a lot of questions,

But it's time for us to leave,

In order to meet you, a lot of energy has been consumed here,

It won't be long before the place is closed, and then it absorbs the light energy and enters a state of automatic charging! ”

"Closed state, it will take at least 612 years!"

Hearing Xiaoguang's words,

Yang Meng nodded slightly, although he did have a lot of questions to ask.

"And how do we get out of here?"

"Come with me!"

As soon as Xiaoguang's words fell, a red hole appeared on one side of the wall,

Xiaoguang didn't say much,

and entered the red hole,

And Yang Meng glanced back at the ball of light behind him that was gradually extinguishing,

also followed Xiaoguang into the red hole.

While leaving here, Yang Meng also asked Xiao Yi:

"How, can you determine the form of energy of the red hole, and the light sphere?"