"Lizardmen, this is a real lizardman! They're still holding spears! It's exactly the same as in the movie, but it's a little smaller......" Zhang Peng said excitedly. Ｘ

"What lizard...... What's all the fuss? ”

"Black" didn't want to deal with him, but when he saw that Zhang Peng was arguing so much, he had to say angrily: "It's really an uninformed hillbilly, isn't it a geothermal creature?" ”

Zhang Peng immediately pricked up his ears and listened, in fact, ......

He's here to talk!

It's been a long time since he's delivered a useful "diplomatic report."

"What is a geothermal creature?" Zhang Peng pretended to be curious and asked.

Over the years, he has gradually figured out the strange psychology of "black".

It seems that he has been stimulated by many networks, and this idiot thinks about pretending to be forced all day long......

Yes, it seems that "pretending" can bring it great pleasure.

Zhang Peng secretly slandered, this kind of alien is really not a normal creature, isn't it embarrassing to panic all day long?

"Black" didn't know Zhang Peng's psychological activities, and felt that Zhang Peng's question didn't seem to be too much of a secret, so he spoke directly: "The evolution and reproduction of life must have a stable source of energy, and all life activities need energy." It's not hard to see why, right? ”

"And the most common source of energy, of course, is stellar illumination, which is called light creatures, and is the most common in the universe."

Of course, to say these things that humans don't know, it also has the meaning of showing off their knowledge.

Whenever I see Zhang Peng's stunned expression, it always has a huge sense of accomplishment that he has "pretended".

Well, this weird emotion only comes after having a human body......

It couldn't have been so retarded before.

However, it is reluctant to say too much, and the province is cheap for nothing, so it is always very conflicted in its heart.

Sure enough, Zhang Peng made an expression of "humbly seeking advice", which made Hei Da satisfied.

It had to reluctantly speak: "The second category, of course, is geothermal organisms. ”

"The essence of geothermal energy is the nuclear fission of radioactive elements, which can usually last for hundreds of millions or even billions of years, so it can also be a stable source of energy."

Zhang Peng nodded seriously, the earth's 4.6 billion years of life still has a huge amount of geothermal energy, not to mention this larger and more geologically active Nix star.

Uranium-238 has a half-life of 4.45 billion years. In other words, every 4.45 billion years, geothermal energy will be halved. That's a long time span.

So geothermal energy is actually a very stable energy source, and it can output stably like a star.

Zhang Peng quickly wrote down these things in his notebook, and then kept asking: "According to this, there is no stellar light on the surface of the Nix star, and if there is life, it can only be geothermal life, right?" ”

“…… The Martian virus in the Martian uranium mining area, which actually uses nuclear fission energy, should also be classified as geothermal life. So, are there other life forms? Are there only these two? ”

This is what he asked sincerely, and if humans encounter strange lifeforms in the future, they will also be on guard...... Don't always trade your life for knowledge!

In this landslide accident, Zhang Peng actually blamed himself and felt that he also had part of his own responsibility. He knew that the "black" in his mind would definitely have relevant landing knowledge and safety precautions.

It's a pity that this "black" seems to be very reluctant to serve humanity.

It is only after the discovery of an unknown that it adds a few words on the fly, to show its erudition, and the rest of the time it is almost silent.

Zhang Peng also has no problem with it.

But this time, "Black" didn't squirm, it was silent for a long time and said: "Light type and geothermal type are the two common life methods of carbonyl creatures. It is also the two easiest ways to form large creatures and intelligent civilizations, because their energy sources are the most stable and reliable! ”

"But life is everywhere in the universe, and you may have experienced that. The tenacity and universality of life are indescribable in words......"

"It's not just carbonyls, it's silicon-based, sulfur-based, it's just that they're not very common. Even...... There are also advanced life forms with photons and energy as units, forming a more advanced civilization, which is really a species that we can hardly imagine. ”

"But most life forms are relatively low-level and understandable."

"We once visited a planet that was almost dead and there was no light, no geothermal, not even uranium! Energy is extremely scarce, and there is only a group of tenacious microorganisms capable of breaking down organic matter such as methane......"

"Breaking down methane, what's so strange about that?" Zhang Peng couldn't help asking.

He was actually more curious about the advanced life of the photon class, but when he saw that Hei was obviously vague and didn't want to say anything, he could only suppress his curiosity.

"Yes, this kind of creature that can directly use chemical energy is nothing unusual."

Hei said lightly in his mind: "But we were surprised to find that after hundreds of millions of years of survival and reproduction, all the chemical energy on this planet has been exhausted, and there is not a trace left. But they still exist, don't you say? ”

"Why? Don't they need energy? Is it to survive by devouring each other? Zhang Peng asked curiously.

Seeing Zhang Peng's curiosity, "Hei" had a feeling that he had pretended to be successful.

It scoffed, "How long can they hold up devouring each other?" Just like you human beings, if you lose all your food, can you sustain millions or tens of millions of years of cannibalism? ”

“…… No. ”

Zhang Peng was extremely disgusted by the example given by "Hei", and he had goosebumps all over his body.

So, the real answer is...... Meteorite! When these microorganisms lack energy, they automatically strip off all water and enter a state of woody fiber-like dormancy. Only after the meteorite hits the ground, bringing a small amount of energy, will they be active again to survive, reproduce and ......"

"All the life on a planet, they have exhausted all the energy in the planet, and they are all waiting for the impact of meteorites...... Meteorite impacts are all their source of energy! ”

"You can imagine how sad these lives are. Is this a way of survival lucky, or is it another kind of misfortune? "Black" said meaningfully.

"However, they are just microorganisms...... Zhang Peng said halfway, as if he understood something, and was silent and stopped talking......

The caverns underneath are getting wider and hotter.

"This is the big cave where the village is located, and we're almost there!" One of the soldiers shouted, his voice growing excited.

This central cavern near the crater is really huge, and the lava crater alone is ten kilometers wide! Bottomless below, you can even see thick layers of red magma!

And the whole area is like a high-rise building, and it is divided into dozens of floors, with traffic extending in all directions.

Look...... Like the underground city dug up by the dwarves in mythology!

It is this pile of magma that all living beings in the underground ecosystem depend on for their livelihoods.

All underground creatures are not afraid of the poisonous gases of volcanoes, and these high concentrations of carbon monoxide and hydrogen sulfide gases, which can easily poison people, are excellent tonics for them......

The indigenous village of the people's destination is located on one of the volcanic rock walls, which occupies less than a ten-thousandth of the entire cave.

This volcanic rock wall, with large and small dirt bags and caves, is supposed to be the residence of lizards.

The village is surrounded by a wooden fence and a thick earthen wall, leaving only a small entrance.

Many lizards lay on the walls and at the entrance of the village, looking curiously at humans.

"It seems...... They have learned to build villages, and they have also invented the piling of earthen walls, the equivalent of our Stone Age! ”

A sociologist studied the rough walls with interest.

He just wanted to walk over and touch the wall,