Tiny wafers are insulated in vacuum, and the coal seam is covered with snowmelt and ancient forests.

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"Funny little guy...... It's so small, it must be a juvenile that has only been born for a long time. ”

Xinglan placed the little Snow Crystal Rabbit in the center of her palm, her palm had no body temperature, almost exactly the same temperature as the surrounding environment, so it would not melt the layer of snow wrapped around the outer body of these little rabbits.

Xinglan narrowed her eyes slightly, and the infrared detector once again carefully observed the snow crystal rabbit at close range, but it was still a low temperature area in her sight, and she could hardly find any temperature changes that represented animal activity, and only when these little rabbits opened their mouths, they could detect the slightest temperature change area.

"It's such an interesting little guy, you can't find a trace in the infrared field of vision, and even visible light makes it difficult to spot this snowball-like snow crystal rabbit." Xinglan continued to soothe the young rabbit in her palm, and the signal began to be released, scanning the internal structure of the creature, "Is the skin on the outside densely covered with glands that produce a kind of mucus that attracts ice and snow and makes it difficult to dissolve?" Eh, it's not just that, it's here...... Incredible skin dissection, which is the dividing line between the internal thermostatic zone and the outer cryogenic zone. ”

Carefully pinching the little ears of the Snow Crystal Rabbit, Xing Lan was observing a series of changes in this area under the squeeze of external forces at the molecular level: "There are actually many dense chip tissues distributed in the skin interlayer of the whole body? In the middle is a tiny wafer in a vacuum, and it's amazing that it covers the surface of the body so much that it prevents the loss of heat from the body and keeps the surface at the same temperature as the environment. ”

"Really, I don't understand what my sister is talking about...... Xijie slowly stretched out his little paws to the group of snow crystal rabbits in front of him, but the other party let out a frightened scream again, even though it was indeed a fun thing to watch a bunch of small white fur balls trembling there at an extremely high frequency...... Well, this is a very immoral and bad onlooker, Xinglan still grabbed Xijie's body and lifted it to the side, saving the little rabbits who were about to break their hearts from her clutches.

"Really, they're not your toys......" Xinglan ignored the knot that was chanting "Sister is really happy to change her heart" in a low breath on the side, and put these little rabbits that could blend with the ambient temperature back to the original tree hole, and those little guys finally regained their sense of direction, and rushed into the black hole one by one, "Goodbye, little guy who was born with vacuum insulation, wait for your mother to come back." ”

"Sister's bad eyes...... "The somewhat sullen Xijie jumped onto the branch above, looking a little unenergetic, "I'm starving to death, I'm so tired that I don't have the strength." ”

"I'll find out if there's anything to hunt later, and you're not happy to kill these little guys." Xinglan looked up at the grumpy little mystery Xin and smiled, and did not leave, but directly put her palm on the rough trunk of this big tree, "Sure enough, sticking to the bark of the tree feels warmer here." ”

Snowflakes were flying in the sky, and large areas were falling, but these snowflakes did not accumulate on the ground here, and not even the branches of this forest could see any snow. As Xinglan carefully observed the heights, she could clearly see that the snowflakes that flew onto the branches seemed to fall on the skin of an ectothermic animal, and were melted directly by the temperature. Droplets of water from snowflakes flowed down the branches, some silently sliding down the trunks to the ground, while others gathered directly into larger droplets and fell down, making the trees crackle as if it were raining......

"I made a mistake in my previous guess...... Although he said this, Xinglan's face did not show any look of chagrin because of the mistake, but was full of excitement and curiosity, "I originally thought that the phenomenon here could be caused by the upwelling of the crater or the underground hot springs, but I misjudged it." ”

"It's not because of the warmth here that this evergreen forest grows." Shioyu rubbed himself comfortably against the trunk of the tree, "It's because of this strange forest that grows here, which creates a warm and comfortable environment here." ”

"That's right, that's it......" The signal of the Snow Crystal Rabbit that had just detected the Crystal Rabbit began to contact these strange trees again, tiny space debris traveling through the gaps between each atom, summing up a lot of information, "They're trees, and they're also heating engines, oh my God, I've never seen a plant have such a high respiration rate!" ”

"Breathe?" Shioyu subconsciously looked up at the green canopy above.

"That's right, they're respiring very quickly. The main role of those leaves is no longer photosynthesis, and their surface is densely packed with stomatal cells. Xinglan closed her eyes and concentrated on analyzing the chemical reactions inside the trees, "These stomatal cells quickly suck not carbon dioxide, but oxygen in the air, and these respiratory rates almost the same as those of mammals are used in plants that do not perform muscle movements, and a large amount of energy is released in the form of heat, and they even change the ambient temperature of the entire area because of it!" ”

That's right, these trees ...... It is a homeothermic plant.

"No wonder little rabbits like to hide in tree holes, I'll just say why it's so warm in there~" Xijie jumped up flexibly on the canopy of the tree, and landed lightly on the branch of a big tree opposite, shaking off several green leaves, "Eh, when I saw these green leaves flying, I suddenly felt a tingling ......"

Not to mention the tide knot, even Xinglan couldn't help but shudder when she saw those green leaves whirling and flying in the wind, and they glanced at each other, and they all remembered the scene that was enough to make people suffer from dense phobia for the rest of their lives: the overwhelming image of an army of leaf insects pouring down like a green flood flying above the Star Illusion Forest......

It was a disgusting sight! Even Xinglan didn't want to see those terrible bugs anymore, hoping that they would all be completely wiped out in the fire that burned all over the island and the explosion of the Yanghai Space Gate afterwards.

"But it's all in the past. The trees here are not astral trees, and their leaves are not leaf worms. Xinglan exhaled softly, but unfortunately she didn't have a body temperature and wouldn't have the effect of white mist even if she exhaled, "These trees can easily melt the snow, and there is no need to worry about the branches and leaves being crushed by the thick snow, hmm...... Let's call them Snowmelt Trees. ”

"Sister, it's not right, it's not right." Xijie suddenly thought of something and interrupted Xinglan's words, "If these trees really have been breathing at such a terrifying rate, and at the same time generating such a large amount of heat, it doesn't make sense...... Where do they get their energy? Even the intensity of light in a tropical environment is unlikely to meet such a large energy demand, let alone a perennially cloudy ice field. ”

"That's right...... What is the source of energy? After frowning suspiciously, Xinglan bent down next to the trunk, and the signal gradually moved down the trunk, tracking and positioning each carbon atom of the internal chemical reaction, "Is it down there?" Structure of carbon atoms from roots......"

Xinglan smiled, her slender fingers gently pulled the soil at the root of the big tree, and plunged it into the soil layer with a force beyond the limits of human beings, the seemingly thin skin squeezed the ground very tenaciously, and then Xinglan turned over the area fiercely, revealing the soil mixed with black particles under the surface soil.

"It's ......" Shioyu jumped off the branch and watched as Xinglan picked up a black strange particle from the turned dirt and looked at it.

"I see, it's coal." Fingers squeezed the small black particle into powder and sprinkled it on the ground, Xinglan looked thoughtfully at the spreading roots, "Their energy source is coal, and there must be a shallow buried bare coal layer underneath here, so the energy source of these trees makes sense." ”

"But sister, in the tutorial you typed in the computer earlier, shouldn't it be that trees form coal in the ground?" Xijie looked at the coal particles that were sticking out of the ground strangely, "How did it turn into a tree to draw energy from the coal?" ”

"No, it's not contradictory, there must have been a large primeval forest here...... Let me think about it......" Xinglan stood up, her long blue hair falling down her body, she looked up at the huge silver eyes made of stars in the sky, and bit her lip gently, "Hmm, after the division of the Yuan Continent, the Northern Yuan Continent moved from south to north, and the forest that was once a mild region gradually became colder, and the trees began to adapt to the environment, so they gradually evolved...... No, no, coal has to be deep to form. ”

"In this way, because the ancient forest has existed for a long time, maybe tens or even millions of years, it has produced coal layers in the depths of it, and then there was a violent plate movement that transported the coal from the depths to the shallow layers, what plate movement would be so violent...... Oh yes! The crust caused by the Yanghai Space Gate is torn! ”

"Then it makes perfect sense!" Xinglan, who had fallen into a strange state of excitement, stood up excitedly and looked at the woods at night, "Trees have gradually evolved in order to adapt to the colder and colder environment, so their survival mode has gradually changed from photosynthesis to absorbing the energy of underground coal at the same time using their root system, and this energy is even enough to support them to produce a warm area!" In the ice field, this warm environment can definitely form a dense gathering of organisms that resembles a desert oasis......"

"Sister, what's wrong?" Xiyu looked at Xinglan who suddenly stopped reasoning, as if he had stiffened.

"Why...... Didn't find the abundance of creatures here that you could have imagined? Xinglan bit her lip lightly and looked at the unknown area shrouded in darkness around her, "Why can only a few little snow crystal rabbits hiding in tree holes be found in the snowmelt forest?" No other large animals were found......"

A cold wind swept through the forest, mixed with fine snowflakes, but its trajectory began to become strange at some point, swirling back and forth between the trees.

"Complex vortex formed by local warming...... Xing Lan stretched out her hand to feel the wind echoing in the air, and a solemn expression appeared on her face, "There is a mixture of ...... in the air It is a chemical pheromone. ”

"Here's the trap!" Xiyu also reacted, quickly jumped from the branch to Xinglan's shoulder, and looked around nervously, "It's good that it's dark now, let's hope the enemy won't find us in the dark woods so soon." ”

"No, I'm afraid it's even worse......" Xinglan pulled out two silver-white electromagnetic guns and smiled bitterly, "You still haven't understood?" Why did the Snow Crystal Rabbit evolve into a form that is wrapped in ice and snow on the outside and has many tiny vacuum insulation layers on the inside of the skin? ”

"I'm afraid the enemy is the one who has the ability to detect infrared rays...... Nocturnal animals......"