Behind me came the increasingly distant and shrill cries of the giant bats.
Huihui did not slow down and continued to fly forward at the fastest speed.
About two minutes later, there were no more bat calls behind him, and Xu Xin breathed a sigh of relief.
"They won't be able to catch up with us, Huihui. If you're tired, just slow down a bit. We still have 300 kilometers to go."
"Ah—" Huihui screamed, and his speed slowed down slightly, but not too much.
Beside Xu Xin, Lao Yang, who had been leaning over Hui Hui's back, stood up and looked behind him: "Get rid of them? You used the tree house core to attract their attention. Your method is really good."
"Don't you know that the tree house core can attract them?" Xu Xin asked.
"I know what you mean when you do this." Old Yang turned around, took out his dashboard and operated it, saying, "We don't usually come into contact with purebred giant beasts. Even in experiments, they are all blood-marked giant beasts, so we don't know much about this kind of purebred giant beasts."
I see.
Xu Xin looked forward.
This tunnel is very wide and relatively straight. Huihui has been flying for three or four minutes, and there are still no rugged forks in the road. Although it is not straight, the general direction is generally correct.
No wonder those giant bats choose this place as their gathering place. Given their size, this is the only place where they can fly freely.
but…
Since giant bats live here, then...
"Keep moving forward, there's no problem with the direction." Old Yang raised the dashboard in his hand and showed it to Xu Xin.
Xu Xin nodded: "Gray, just keep moving forward."
As he said this, he took the trembling little fellow, who was still clinging to his arm, into his arms.
"ah-"
“嘤…” Coco was not so scared anymore when she was held in Xu Xin’s arms. She raised her little head and looked ahead, then buried herself in Xu Xin’s arms again.
It's a little afraid of heights.
And now Huihui's speed is also very fast. Even in this not-so-wide tunnel, his speed is at least 300 kilometers per hour. There is no protection like that of an aircraft, so Coco will of course be afraid.
But hurry up. At this speed, we should be there within an hour.
Even the oncoming wind made it difficult for him to open his eyes, so Xu Xin leaned over and lay on Huihui again.
Lao Yang beside him did the same thing.
"The speed of your pterosaur is much faster than I imagined." said Lao Yang.
"Have you ever come into contact with a pterosaur like Huihui before?" Xu Xin asked.
“I’ve seen it before. This pterosaur is a companion that only those who maintain order can have. Compared to our aircraft, it’s much slower, but more flexible.
Moreover, they have strong strength and recovery ability. Unlike our aircraft, which cannot be repaired once broken, they can be repaired very quickly even if they are seriously injured. They only need to be provided with the necessary things. Therefore, they are deeply loved by the order maintainers. Each of them will raise one, but yours... is a little special."
"Oh? What's the special method?"
"Your... this one is a lot bigger than the ones I've seen before, and, this speed..."
Old Yang raised his head, but the wind blew so hard that he couldn't close his mouth. He had to lie down again and said, "This speed is much faster than what I've experienced before. However, maybe it's because the pterosaurs I experienced before didn't fly at full speed."
Is Huihui a little special
If Lao Yang knew that Huihui was only a few months old, he would probably be even more surprised.
"ah-"
After Huihui shouted, he suddenly sped up, increasing the speed a little bit more.
Although the speed at that time caused the wind around to be very strong and whistling in the ears, Huihui could still easily hear the voices of Xu Xin and the others.
It seems to be saying, look, the speed just now is not my limit, I can go even faster!
"Huihui, there are still more than 200 kilometers to go. Don't waste your energy, otherwise you won't be able to fly later." Xu Xin stopped him immediately.
"ah… "
After hearing what Xu Xin said, Huihui slowed down again and stabilized at his previous speed.
It seems that this speed of about 300 kilometers per hour is the speed at which Huihui can fly and glide for a long time.
That's really fast.
According to archaeologists' calculations based on existing fossils, Quetzalcoatlus, the overlord of the sky during the Cretaceous period, could fly at a speed of 107 kilometers per hour. That's three times the speed of the pterosaur overlord hundreds of millions of years ago!
This is in the uneven terrain of the underground tunnel. If it were in the air, with the wind, perhaps it would be even faster!
“嘤…?” Coco suddenly poked her little head out from Xu Xin’s arms, blinked, and then shrank back.
"...?" Xu Xin looked down at the little guy in his arms.
What did the little guy discover
However, since it is not in a hurry, it means there is no danger.
but…
"There must be more than just this group of giant bats around here," said Xu Xin.
"Yes, I know." Old Yang nodded. "Since this group of bats can survive here, it means there is a complete food chain here to support their lives."
The high-intensity flashlight in Xu Xin's hand had been shining a light forward for Huihui. He then took out another high-intensity flashlight and shone it downwards.
"this… "
He was surprised to find that there was actually a whole different world underneath!
This long cave tunnel is actually a small ecosystem.
Xu Xin saw a stream of water flowing through this tunnel, forming an underground river.
Because of the wind, he did not hear the sound of flowing water below. He only discovered the situation when he turned on the flashlight.
And there are various creatures beside this underground river.
These creatures look like insects, but their bodies are as huge as tigers. Seeing them in this dark underground space makes people feel a little creepy.
"So there are giant insects living here. But these insects..."
Huihui was very fast and every insect disappeared in the blink of an eye, but Xu Xin still captured the appearance of a few insects.
Completely different from the giant insects he had encountered before.
He was familiar with the giant insects before, at least. Most of them were the insects he was familiar with before that had become very big. But the giant insects here were indeed strange in shape, even a little scary.
"This should be an ecosystem." Xu Xin said, then looked at Lao Yang and asked, "Have you never encountered such a situation when traveling through the underground world? Encountering a giant beast, and then the aircraft was destroyed."
Old Yang shook his head: "Of course I have encountered giant beasts. The underground world is full of giant beasts. But I have never encountered one around here."
He also looked down and said in surprise: "I never thought that there would be giant beasts living here. This place is only about 500 to 600 kilometers away from the alien invaders' headquarters, right? Experiments are never allowed here. It should not be artificially placed here. Maybe they migrated here on their own? I can't believe that the giant beasts in this underground world have expanded here..."
Thinking of what happened just now, Lao Yang couldn't help but feel a little sad, and said self-deprecatingly: "I really haven't experienced such an exciting thing in hundreds of years."
"That's nothing." Xu Xin turned to look at Lao Yang and said with a smile, "What we are going to do next is much more exciting than this."
"That's what you will do next, not me." Old Yang put away the gun he was holding and said with a wry smile, "I'm too old to afford to be so hasty. Just leading you is enough to make me nervous."
“… He’s over a thousand years old, but his body is still much stronger than mine.” Hearing this, Xu Xin twitched his lips slightly.
"Better than you? Haha, that's just an appearance."
Old Yang turned around again and took a look, making sure that there were no giant bats chasing him. Then he relaxed and said, "I don't have many years left to live. Do you really think we can live forever?"
Xu Xin's eyelids jumped: "What do you mean?"
"The alien invaders do have some very exaggerated life-extending drugs, but... do you think they can give us humans that kind of drug?" Old Yang glanced at Xu Xin and said.
ah…
Xu Xin couldn't help but glance at Lao Yang.
Yes, if such a drug really exists, how could it be used on humans
Xu Xin and his colleagues had indeed been injected with a genetic drug that could almost make them immortal, but that drug was not given by alien invaders, but was developed by an organization from another time and space.
Now that I think about it, the prerequisite technology for this drug should also have been given to their organization by the monster, right
But Lao Yang is not so lucky. The survivors of this time and space do not have any organization that studies the potion of immortality.
"We live longer than ordinary people and our appearance does not age because of the mutation of our blood veins."
Old Yang pulled down his high collar, revealing the bloodstains on his neck.
There were no blood streaks on his face, but there were some on his neck, similar to Lou Feier's situation before.
"The blood vein mutation has changed some of our genes, giving us a longer life, but life also has an end. For example, my time will come soon." Old Yang sighed, "The age at which a blood vein human dies is probably around a thousand years old."
"you… "
Xu Xin opened his mouth. He didn't expect that Lao Yang was about to die
"How much time do you have...?"
Old Yang sighed again: "Probably, there is only less than a hundred years left."
Xu Xin: “? How much?”
"In less than a hundred years, I will die." Old Yang's expression was very melancholy. "The reason why we chose to help you is that our life span is coming to an end. Since I'm going to die soon anyway, we might as well try to help you."
He then smiled and said, "To be honest, if you had come here a few hundred years earlier, we probably wouldn't have been able to help you."
Xu Xin: "I..."
He didn't know where to start complaining.
I have only a hundred years left to live. Is this the end of my life? Is this death
My goodness, if ordinary humans could live to be a hundred years old, they would be worshipped as centenarians, and could have five generations living under the same roof!
The other person's tone and expression were so melancholy, he thought Old Yang would not live for many years...
"…According to what you said, ordinary people are almost buried as soon as they are born."
Xu Xin couldn't help but complain.
“Huh? Ah…” Old Yang was slightly startled, then smiled embarrassedly, “Your view on life span may be different from ours. I have lived for thousands of years, and a hundred years is indeed not long in my opinion.
Let me think about it... Just like an 80-year-old man, even if he can live another 10 years, he will feel that he is dying every day. I am in such a state now."
If explained this way, it seems to be the case.
"Then we are really lucky to find you just when you are 'on your deathbed'." Xu Xin said unhappily.
"Uh... I'm serious." Old Yang said helplessly, "Forget it, your view on life span is indeed different from ours, so forget it if you can't understand it."
"You don't look old at all. I really can't understand." Xu Xin shrugged slightly.
"We will start to age in the last dozen years of our lives. There are already three such people in our team, and one has left us," said Lao Yang.
It turns out that some survivors have already died of old age.
Being able to live for a thousand years and die of old age is a kind of happiness for the survivors.
"I can't understand your view on life span yet, but maybe I will understand it in the future."
Xu Xin's current life expectancy is longer than Lao Yang's.
His current situation is that his natural lifespan is very long, and dying of old age is impossible for him.
If he died, the only possibility was that he was killed.
Severe injuries, poisoning, hypoxia, incurable serious illnesses, etc.
So, if he could live another few hundred years, perhaps he would be able to understand Lao Yang.
But the premise for him to live for hundreds of years is...
This operation must be successful.
If this operation fails, no matter how long his life is, it will be useless. He might even die at the hands of the alien invaders.
"Gray, are you tired?"
"Ah—" Huihui shouted, indicating that he was not tired.
"That's good."
…
"Gray, there will be three passable caves ahead, two large and one small. Choose the one in the middle." Xu Xin said.
"ah-"
Xu Xin looked forward.
Time, more than an hour has passed.
They did not arrive within an hour as he had imagined. The closer they got, the more rugged the terrain became. Before half an hour had passed, they could not find a path that would allow them to fly straight for more than half a minute.
It was almost shuttling back and forth, turning left and right.
If there were a flying shuttle, it might be faster, after all, it would calculate the route itself.
But now, relying on Lao Yang's manual guidance on the dashboard, Huihui's speed inevitably slowed down a lot, and he was even directed to the wrong road several times.
Now the dashboard has been snatched away by Xu Xin.
"We'll be there soon. Look on the ground."
Old Yang pointed downwards.
Xu Xin leaned over and looked down.
I saw that the ground below at this time was no longer composed entirely of various rocks.
Extremely thick tree roots have begun to appear here.
After flying for just a dozen seconds, the tree roots became more and more numerous and denser.
These extremely thick tree crowns are intricately intertwined and entangled, interspersed with the ground, stone walls, and tops of this area.
The green roots bring vitality to this dark area, making it look a lot more comfortable.
"The roots of the world tree?" Xu Xin raised his eyebrows slightly.
"Yes. It's just ahead."
A minute later, light appeared ahead.
There was no need for Xu Xin to turn on the flashlight, Huihui could see clearly what was ahead.
"ah-"
It flapped its wings and, like a marathon runner making its final sprint, its speed suddenly increased.
Xu Xin also let out a breath.
It's finally here.
Their plan can now be implemented!
However, more than two hours have passed since they left the World Tree.
I don’t know what’s going on over there