I was still carefully studying Feng Shui, but Da Fei shouted in front of me, "There are still fifteen kilometers left!" ”

This peak may be a marker for them, meaning that there are still fifteen kilometers from that ancient tomb. This is not unusual, but Da Fei's voice is a little strange, as I said before, her voice is very good, but this voice is a little weird, and when I smack it carefully, it seems that every word she said has been repeated many times!

It seemed that everyone felt the strangeness in it, and looked at Da Fei in surprise, but Da Fei looked left and right in some panic, as if he had seen a ghost.

Because they were deep in the mountains, far from the Gega gathering area, and all the people were not wearing gas masks, this situation was definitely not explained by radio interference. I don't know if Wang Shanqi is really right, the special terrain has caused the sound to be repeated, and the source of the noise last night is here!

The second pot head shouted over there, "Don't mess around, this is an echo!" ”

Sure enough, his voice also changed to such a strange tone, and now no one was worried about anything, and several people still thought it was funny, and kept shouting.

I felt that something was wrong when I heard their ghost crying wolf, everyone had heard the echo, generally speaking, it was a repetition of the whole sentence, it was absolutely impossible to repeat each word separately like this, but it didn't seem impossible, I pondered it myself, and soon thought about it, so I simply asked Wang Shanqi.

Wang Shanqi was there with a scholarly temperament twisting his eyebrows and thinking, when he saw me coming, he asked first: "Do you think something is wrong?" ”

"Nonsense, of course not, how can there be such an echo?"

"It's not nothing," Wang Shanqi touched his chin, "Strictly speaking, it can be regarded as an echo, but there are two conditions for forming such an echo, one is to delay the reflection of each sound node, and at the same time to speed up the reflection of the whole sentence, do you think it is possible?" ”

When I heard him say this, my brain lit up, scientists are scientists, I pondered for a long time how to express it, and people just said a word, "How is this possible, it is completely contradictory!" ”

"What if there were two different reflex processes in the propagation? Elongate the sentence on the first reflection and speed up the frequency on the second reflection? ”

I didn't understand what this should look like, but I was keenly aware that he was going to drag the conversation to a place I didn't understand, so I said, "What you said makes sense, but could it be the result of space compression and space release at the same time?" ”

Wang Shanqi didn't hear the meaning of my words at all, and thought for a long time before saying, "Can you elaborate?" ”

I ignored him and walked away with a smile, this kind of thing is just a strange natural phenomenon, and there is no threat to our actions, so I didn't pay much attention to it, but Xiao Kan thought it was funny, and he was embarrassed to shout loudly and just slap hard.

After that, nothing unusual happened, and soon the valley changed direction again, and we chose a shallower slope and climbed up the hill again under the guidance of Da Fei. Not long after walking, there was a sudden shouting in front, and several guys from Erguotou gathered in front of a cliff, not knowing what they found, shouting and waving to the back.

We walked up quickly to see that among the sandstone mixed with gravel and shell fossils, there were several slightly regular stone slabs embedded obliquely, these stone slabs were not naturally formed at first glance, although they had been rubbed and smooth, but obvious traces of axe chisel could still be seen. Several stone slabs are uneven but arranged in sequence, like a road, leading into a sandstone mountain.

Erguotou stood behind him with his hands behind his back, and Shi Shiran said: "The stone path of the cold mountain is sloping in the distance, and there are people in the depths of the white clouds. ”

I understood what he meant, these stone slabs are the stone paths of Hanshan, and that person naturally refers to the ancient tombs, but I always feel a little cautious when I say this, and I just casually break him down with a good talent.

Anyway, we are not in a hurry, such things are also extremely rare, so we simply stopped and dug it out to see, from the age of the formation of this sandstone I don't know how old, so far back to that time people are probably still monkeys, these stone slabs appear in this look particularly unserious, just like a joke.

I watched a few guys at Erguotou chisel stones, and said to Wang Da Scientist who was standing next to me, "Look, you still say that there is no prehistoric civilization? What's going on with these slates? ”

Wang Shanqi didn't speak, I glanced at him and continued: "Look at this is really a road, don't dig and dig and dig out a car." ”

"This is not necessarily a prehistoric ruin, I think it is more like a plank road......" Wang Shanqi said with his chin pinched.

"Plank road?" I was about to die of laughter, "You can see clearly, this cliff is only four or five meters high from the ground, why bother walking up here?" I pointed to the bottom of my foot.

Wang Shanqi glanced at me, "It's hard to say, the geological changes of Taihang Mountain are too great, maybe there was no small mountain under our feet at that time, and this cliff must be more than 100 meters high!" ”

I looked at my watch, and indeed, it was a hundred meters above sea level compared to the valley.

"It's also possible that this place may have been a river or some other impassable place at the time, it's hard to say." Wang Shanqi continued.

By this time a slate had been pulled out, and when I looked over it, I saw that the slab was mottled with grit, as if it had been hard to come out of the sandstone. But this doesn't mean anything, sandstone has a strong affinity, and it can stick to anything over time.

Wang Shanqi also came over to take a look, but his face changed a little, and he commanded people to erect the stone slab and look around the stone slab non-stop.

I asked him, "What's going on?" ”

Wang Shanqi didn't look at me, but said in a very uncertain voice, "I seem to have seen a fossil ......"

Fossil? I circled around the slate twice, and finally saw half of the fish bone in an inconspicuous corner, and I reached out and picked it off...... What's going on? When the plank road was built, the workers ate the leftovers?

"What is this?" I asked.

"Whatever it is, it's a fossil, and if it's a fossil, it's not close." Wang Shanqi took two breaths, "This fossil is incomplete, but it must be a true bone fish, and the age will not be less than a million years!" ”

"A million years?" I was taken aback.

"That's right, around the time of the Quaternary." Wang Shanqi said, "It was the era of Beijingers, the age of glaciers!"

I looked at the iconic half-cut fishbone, I didn't know what to say, it was the first time for me to face such an ancient artifact so closely, "You mean to say that this thing was made by Pekingese?"

"Maybe this fossil is much earlier than a million years old, from 4.8 million to a million years old, do you think a group of monkeys with paleolithic tools can process something like this?"