Yu Yifeng couldn't help but sigh: "It's amazing! This thermonuclear organ is like a thermoelectric battery, which can actually 'recharge' itself with thermal energy. Ｘ”

"Their body structure has also evolved with thermonuclei as the core. The long tail is more likely to cause temperature differences on the body. ”

"This organ looks more advanced than the human digestive system, and the key is to maintain the temperature difference between the inside and outside of the body in order for heat to flow. Their bodies can stay in the 60 or 70 degree heat zone for long periods of time, and they feel very comfortable. ”

Speaking of this, Yu Yifeng looked disgusted, human beings actually rely on food as an energy source, which is really low-end, and it is very inconvenient.

Although the Knicks also eat a small amount, it is generally much less frequent than humans, and food is not the main source of energy.

"If human beings also have such organs, how much work can be saved, how much time can be saved, and sleep can be ......"

However, when he saw Yuriko's frowning expression, he quickly shut up.

This girl has basically no other hobbies, the only hobby ...... It's just enjoying food, or maybe it's a unique human culture.

Yu Yifeng changed the topic and said: "In this way, similar thermonuclear organs basically have all underground creatures, and even indigenous lizards should have them, right?" ”

Yuriko nodded and snorted. However, she still said seriously: "Yes, a large number of similar organs have been found in many underground organisms, which have a certain reference significance for our biology. However, the Knicks and the indigenous lizards are two different species after all, and their body structure is still different. ”

"What's more, over the past 10 million years, the ecological environment of the Knicks Star seems to have undergone very significant changes!"

"More than 10 million years ago, there was more methane, carbon dioxide and sulfides in the atmosphere, and these gases also provided some chemical energy. A steady stream of meteorites and volcanic eruptions can also continue to replenish these materials. ”

"I don't know why, there is now a lot less carbon-containing material in the atmosphere, so the 'thermocore' in the body of the indigenous lizard has been greatly degraded, and they still need to consume a certain amount of food, unlike the Knicks, who hardly need a small amount of food."

"There are only a few underground black insects and long strip-like plants, but they are relatively pure geothermal energy creatures......"

This is a relatively novel discovery.

In some ancient books that have been discovered, the composition of the atmosphere at that time is clearly recorded: indeed, as Yuriko said, the atmosphere at that time had higher concentrations of methane, carbon monoxide, etc., and the content of oxygen was very small.

Many experts speculate that perhaps the mass extinction of the Knicks had something to do with the dramatic changes in the environment! This is very likely.

Of course, there is another possibility, the change in the atmospheric environment was only after the extinction of the Knicks, and no one knows about this kind of thing...... People need more evidence to judge.

Yu Yifeng paused, and returned to the original topic: "In this way, heat energy is the best source of energy for the Knicks, not food. They can regain their strength by sleeping on their stomachs on a heat source and don't even need to eat. ”

"It's so different from humans that they think very differently from humans and they don't need agriculture."

"If the first great sage is the one who paints the starry sky. So...... The second great sage is the one who risked his life to fish out a basin of magma. They need temperature, they need heat. Their digestive organs are not very perfect, and eating is not a good choice, which will affect their lifespan. ”

“…… Why don't they have fire? Wouldn't it be more convenient to use flames, like lizards? Yu Yifeng had a flash of inspiration, and suddenly wondered.

Yuriko gave him a blank look, and said angrily: "Because there was almost no oxygen in the atmosphere at that time, or the oxygen content in the atmosphere was very low, less than 0.1%, and ordinary combustion reactions could not be carried out!" ”

"They can use the heat energy of magma and the chemical energy in the air, and they don't need to breathe oxygen at all to carry out redox reactions in the body. So these organisms are generally anaerobic. ”

"Without oxygen, there is no violent combustion, that is, no fire!

"It's a bit more than we can imagine...... We don't know how their civilization developed. ”

Speaking of this, Yuriko said in an inexplicable tone, "You can imagine a civilization without flames...... A civilization that can only use the temperature of magma has developed to the modern age and even surpasses the modern ......"

The Knicks civilization has no fire, and this discovery is simply epic! It is an extremely shocking thing for human beings, and even subverts the traditional thinking of sociologists.

It is hard for human beings to imagine that a civilization without fire has developed a glorious modern culture!

Such a civilization, isn't it......

Tougher than humans?

"It's all because of ...... Their culture is extremely intellectual, and they are extremely reverent of the title of 'Great Sage'! Yuriko looked at Yu Yifeng and said faintly.

After saying this, the two fell into a kind of silence.

A world without fire is no longer a nightmare difficulty, it is really ...... Hell difficulty!

If there were no fire on Earth, humanity would still be in the earliest stage of ignorance, similar to that of today's orangutans.

It was only by accidentally mastering fire that man gradually learned to cook meat and fish food, which enabled man to go from the tropical jungle of Africa to the world, to master the basic ability to drive away wild beasts, to survive the coldest ice age, and to provide the possibility for the further evolution of human beings later......

In the past, there was no oxygen on the Knicks, and of course there was no fire, everything ...... None of them!

Even the steam engine and internal combustion engine behind human beings use the phenomenon of combustion. But more than 10 million years ago, in a world where oxygen was very scarce...... Even if methane is everywhere, it will not burn, and the amount of energy that can be used will be greatly reduced.

Looking at it this way, if the starting difficulty of the Earth civilization is "1", the starting difficulty of the indigenous lizard civilization is "10", which is even more difficult than humans.

So...... The starting difficulty of the Knicks civilization is more than a hundred times that of Earth, which is 100!

…… A veritable hellish difficulty!

If there is no fire, can primitive people directly use nuclear energy?

"It's really hard to imagine how society changes in a civilization without flames, and how the technology tree jumps......"

Faced with this almost unsolvable problem, Yu Yifeng also felt very incredible.

In the endless universe, there are always so many unexpected things to please bring endless surprises.

Of course, the universe is so big, and human beings are definitely not the strongest race, nor are they the smartest race. Even the most narcissistic people have to admit this.

And now, a civilization has developed without fire...... They have overcome difficulties unimaginable to humans.

Overall, it's definitely tougher than humans.

This is just a planet that humans encounter casually, in the endless universe, will there be a stronger race of the Knicks civilization?

Of course! The Knicks civilization is definitely not the strongest civilization.

It's a civilization that has been eliminated by the "Great Filter"!

Thinking about it like this, Yu Yifeng felt a burst of creepy......

He suddenly felt a sense of extreme insignificance in his heart.

The bright starry sky, the vast universe, if you don't step into the starry sky, human beings will never know so many strange things. If we do not step into the stars, human beings will forever indulge in the fantasy land they have conceived, fearless and ignorant......

At present, there is only so much historical information about the Knicks civilization in people's hands, and it is not very complete.

The declining Knicks civilization still has a lot of mysteries to uncover......

How did they develop? How did it evolve into modern civilization? How did it decline? Until now...... Still an unsolved mystery.

However, Yu Yifeng is not in a hurry, and humans are not in a hurry, as long as they look slowly, they can always find some clues......

Even if you are in a hurry, you can't be in a hurry, everything needs an opportunity to push ...... r