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"With enough energy, humans can build a self-sufficient ecosystem after the sun disappears." Yuan Haochen speculated.

"We humans can build several large, closed ecosystems according to geography. Considering the thermal insulation, it should be best for these biospheres to be built deep underground. Organisms outside the biosphere are left to fend for themselves, while humans in the biosphere can not only use their own developed energy sources for lighting and heating, but also use the "artificial sun" to grow food, vegetables, fruits, etc. But, very cruelly, the limited biosphere at that time will certainly not be able to accommodate all the people on the planet, maybe only a few people will be able to enter the biosphere, and most people will wait for death outside the biosphere. ”

"When the earth's resources that can be used by humans are exhausted, the closed ecosystem will lose its energy security and eventually go to extinction." Lynn said regretfully.

"In other words, human beings will not escape death in the end." Smith asked with a worried look on his face.

"Unless the Earth is recaptured by other stars on its wandering journey and regains its warmth. Or human civilization can escape from the frozen earth and go to other habitable planets to carry out interstellar migration......" Yuan said.

"Therefore, even if there is a closed ecosystem on Saturn, after 2.1 billion years, it should be empty or dead. As far as we know, the Creators left the ...... 2.1 billion years ago."

"That's a pity!"

"In the end, the only life forms that can survive on the permafrost planet are the underground microbes, because the planet's core is still warm." Lynn adds, "The closer you get to the planet's core, the hotter it gets, which means that even if you strip out the hot-hot areas of the planet's interior, there's still a lot of room for microbes to live in." ”

"I really didn't expect that the microbes were the final winners in life." Smith said with emotion, shaking his head.

At the beginning of the 20th century, scientists discovered many strange worm-like creatures in the water at a depth of 1,300 meters in the Beatrix gold mine in South Africa, which did not see sunlight all day long and lived in absolute darkness, like the devil in the mythical world. For this reason, scientists named them "devil nematodes" or "devil worms".

Then, as they explored deeper beneath the surface of South Africa, scientists made even more astonishing discoveries. At a depth of 3,600 metres at the Tautona gold mine, the deepest in South Africa, they discovered another nematode, the deepest terrestrial creature ever discovered.

These are extremely significant events for scientists studying life on Earth. In the past, it was believed that it was impossible for complex biological forms to survive so deep below the ground.

Now, scientists are convinced that deep in the earth's crust there is an isolated ecosystem that defies many of the rules of biology as we know it.

Organisms in this ecosystem include: microorganisms that have an extremely slow metabolism and have survived for millions of years; Bacteria that don't need to get energy from sunlight; There are also animals that do not need oxygen for their entire lives to survive.

We might even venture to speculate that these microbes may be one of the oldest forms of life on Earth, and that they may have survived since time immemorial. They have existed in these environments for at least hundreds, tens of millions, or even hundreds of millions of years.

"The more I look at it, the more it looks like the earth......"

"I have a hunch that there will be an important discovery on the permafrost planet!!"

They continued their discussion as they looked at the silver-white planet in the distance.

"The Mirai spacecraft began to slow down and is expected to enter a planetary orbit in 30 minutes."

The Intelligent Navigation Flight System began to broadcast the flight status of the spacecraft.

Although there was an artificial gravity field that could weaken the effect of the deceleration, out of prudence, Yuan Chen, Smith and Lynn returned to the spaceship's operation compartment and sat in the safety seats in turn.

While the Future was slowing down, Hara Haochen was using this time to make routine action reports through the camera system.

"Hello Earth Command Center, this is the Future, and I am Yuan Haochen, the commander of this operation. An hour ago, we arrived at the last planet of the Alpha Centauri system, the first Alpha Centauri discovered by the Trunik project team. ”

"Durunik, and other colleagues, this is the first terrestrial planet you discovered. As you can see, in many ways, it resembles Earth, and the only regret is that it is gradually being thrown into cosmic deep space and frozen. We gave it a figurative name - Frozen Saturn. ”

"We speculate that it was once as beautiful as the Earth, and had an excellent natural environment. We believe that it is very likely that there is a great deal of scientific heritage of the Creator civilization preserved on Saturn......"

Soon after Yuan Haochen's report was completed, the announcement of the intelligent navigation flight system of the Mirai spacecraft also sounded in due time.

"It has successfully entered the orbit of the target planet, which is 600 kilometers from the surface of the planet."

The Mirai spacecraft has been successfully captured by the gravitational pull of frozen Saturn, and the spacecraft's flight attitude has been readjusted.

At this time, the frozen Saturn fell in the eyes of Yuan Haochen and the others, and it had already blocked the entire canopy in front of them.

One, two, three.

The Mirai spacecraft began to enter a stable orbiting phase, which took roughly more than an hour to make a circle.

"Commencement of the launch of the ...... of the 10th monitoring satellite"

The intelligent operating system of Mirai has completed the launch of the last three monitoring satellites in accordance with the predetermined plan.

Hara, Smith and Lynn stood quietly in front of the portholes, standing in a row.

The three of them looked up calmly out the window, silent, their hearts as calm as water.

I never thought that when I looked at this frozen planet up close, there was such a different kind of beauty.

The whole planet is like a silver-white block of ice, shining with a cold and bleak light under the light.

"In a world where everything is silent, I feel like my voice is completely frozen at this moment."

"I felt a chill and desolation penetrate the depths of my soul."

"Under this billion-year-old permafrost, are the memories of the alien civilization still frozen......

Faced with this situation, Yuan Haochen, Smith and Lynn couldn't help but sigh how lucky they were to be able to appreciate such a poignant cosmic scenery.

(To be continued.) )