A faint cry came from the depths of the cave, and neither the musk ox nor Chen Song and the gang went too far inside after they came in.

Humans and animals have a natural fear of damp and dark caves, and they are reluctant to go deeper into the caverns even when it is not yet dark.

However, after hearing this strange noise, they must go in and have to take a look, they must stay for the night tonight, and they must ensure the safety of the cave.

Someone turned on a wolf's eye flashlight, and the snow-white cold light shone into it, and the cave that was not very deep was suddenly illuminated.

There was nothing in it, just frozen stones, and although there were some raised stones and icicles on the ground and walls, there was no way to hide the man or beast.

"So where did the sound come from?" Chen Song asked.

Suriname scratched his head and said, "Damn, it's a bit weird, but it definitely has nothing to do with ghosts, ghosts, monsters, etc., we have to believe in God." ”

Beaufort couldn't help but say, "Shut up, brother, if we are going to believe that God exists, then ghosts and ghosts will also exist. ”

"Is this the time to discuss these topics? Who said this has anything to do with ghosts? You are all goddamn veteran adventurers, don't you know that we are in the world of science?" said Eric, angry.

"Okay, don't make any noise, go over and see where the sound is, it's quite regular, it doesn't sound like the wind. Angelina mediated.

Portis looked at Brother Bai and said, "This is the territory of polar bears, why don't you let your pet go over and have a look?" I mean, if there is something hidden in the crevices or under the stones, it will be safer for us to have polar bears come to explore the way." ”

Chen Song said unhappily: "Why don't you take the risk yourself? Your life is fate, and my bear's life is not fate?"

Brother Bai was already as tall as him when he stood beside him, and he put his paw on Chen Song's shoulder and glared at Portis unhappily, this thing was very good at observing words and feelings, and realized that Portis was not on good terms with his side.

Portis didn't dare to offend Chen Song, let alone the polar bear.

Bears are creatures at the top of the food chain, and polar bears are the largest beasts in the bear family, and they are naturally good wrestlers, and there are not enough to fall ten of them like Portis.

Eric is a true adventurer, so he didn't believe that there was danger in this cave, so he took the initiative to raise his flashlight and lower down into the depths of the cave to investigate.

Chen Song followed, and then heard the voice become clearer and clearer.

Eric's flashlight kept flashing over the four walls of the cave, and after about half a minute, he breathed a sigh of relief and said, "I see, I've found the reason." ”

Chen Song asked, "What is the reason?"

The others followed.

Eric pointed to a crack at the bottom of the cave and said, "Feel carefully, that's where the sound comes from. ”

This gap is about half a meter long and one or two centimeters wide, and it is difficult to detect without looking closely.

As he spoke, Eric took out a napkin and put it over the gap, and then the napkin was blown up and floated, and then sucked into the gap, up and down quite magically.

Chen Song wondered, "Why do I feel that I can't hear that sound when I get closer?" Are you sure it came from this crack?"

Eric said confidently: "I'm sure the reason why it's so close that it's not inaudible is because the sound itself is not loud, but the cave has a strange structure, and the sound waves resonate with the cave itself to amplify the tone, presenting it as a regular breathing sound." ”

The group left the bottom of the cave and walked out, and sure enough, they gradually heard the sound of wheezing again.

Seeing that everyone was convinced, Eric felt that he had a lot of face, yesterday Chen Song found gold, Suriname found ivory, and he found nothing as the leader of the team, which once hurt his self-esteem.

Pointing to the gap, he said proudly: "I know this kind of geology, which is geographically called the Resonance Channel Cave, and I bet that if we explore this gap, then we will find that it is very deep and very narrow." ”

"These gaps extend outwards and eventually connect with the outside world. In the event of a blizzard, a strong wind blows in and oppresses the air through this opening to make a sound. But the storm blows rhythmically like the waves, and when the wind recedes, the pressure in the space becomes smaller, and there is air from the cavern to replenish it. ”

"And so, you know, the storm is like a piston twitching back and forth in the crevices, and that creates the regular breathing we hear. ”

Suriname suddenly said: "I see. ”

"You know a lot. Portis said admiringly.

Eric smiled confidently, "If you like to read more books, you don't know less than I do, and I dare assert that if we light a fire in the cave to warm up the air in the cave, the wheezing will be louder." ”

"It's always uncomfortable to hear this in this environment, man, is there a way to get it to stop?" Trickron asked.

Eric said: "It's a little harder, but it should be done, we use ice axes to break the shape of the gap, and the sound they make has a lot to do with the width of the gap, and if we break them, there should be no strange noise." ”

There weren't many such crevices in the cavern, so they searched carefully and found a total of four cracks, and then chiseled them up with an ice axe.

The musk oxen silently turned around and continued to aim their horns at them.

Because of the ice for millions of years, the cave stones are covered in frozen ice and are very difficult to develop, they are very hard.

After doing it for a while, someone suddenly shouted, "Hey, am I dazzled? This, this ore, look, this ore is golden, I have dug gold? God, I have dug gold?"

Hearing this, the crowd was excited, and Eric strode over and asked, "What are you talking about?"

The young man named Longt excitedly stretched out his hand to show him the gravel in his palm, and the snow-white light hit it and emitted scattered golden yellow, with a very clear metallic luster.

"Is this gold ore? my God, my God, guys, I'm developed, no, no, no, we're developed, I've dug up a gold mine, right? There's a gold mine here!" called Lunt excitedly.

Including Chen Song, the group was equally excited when they saw this scene, and they scrambled to grab the ore and said, "Let me see, let me see." "Oh my God, they're so beautiful, we've found a gold mine?"

Angelina was quite sober, she said: "Calm down, everyone, calm down, listen to me, Shakespeare famously said, 'Not everything that glitters is gold', there are many yellow metal ores in nature, and there are several kinds of copper ores, isn't that right?

"I can't calm down, I can't calm down, we're going to get rich! Billionaire, we're going to be the richest man in Iceland, aha!"

Chen Song swept his eyes away, and his eyes were full of fanatical excitement.