Lao Lu was willing to help, Professor Wu was very happy, and in order to express his gratitude, Professor Wu took out a box of cigarettes from his bag and handed it to Lao Lu. Although Professor Wu does not smoke himself, he often goes out for research and inevitably asks people to do things, so he always has cigarettes in his bag.

"Your stick is not good, you think it's a golden hoop stick, watch me use my hoe to open the way for you!" Lao Lu ran to the front, pulled the Wu Jianjun away, and crackled with a hoe to dig up those branches and thorns, and a mountain road appeared in front of him. Some places on this road are smooth, and some places are covered by trees and thorns, and Lao Lu wields a hoe as if walking on the ground.

Dong Yucheng and Lin Xueyi walked behind, the mountain road was narrow and they couldn't walk side by side, Lin Xueyi had difficulty walking, and finally gave the backpack to Dong Yucheng and traveled lightly. Although Lao Lu dug up the thorns that blocked the road, there were still a small number of branches lying across the road, Lin Xueyi's skin was delicate, and her arms and waist were exposed, and finally a branch grabbed the gap and hit her.

Lin Xueyi couldn't help but snort, Dong Yucheng felt very distressed, stopped, and said, "You didn't bring long-sleeved clothes, now you are suffering again, right?" Don't be afraid of dirt and smell, wear my clothes. ”

Dong Yucheng took off his long-sleeved shirt and put it on Lin Xueyi, he only wore a vest, and they marched along the mountain road together, catching up with Professor Wu and a few of them.

About half an hour later, they came to a cliff. The mountains and vegetation are similar to the rest of the place, but they feel that it is more gloomy and cold. A gust of mountain wind blew, and Lin Xueyi couldn't help but shiver. In the gloomy valley, Lin Xueyi curled up, like a chicken that needed protection. Seeing this, Dong Yucheng unconsciously hugged most of Lin Xueyi's waist with his right hand. Although separated by a layer of clothes, Dong Yucheng still touched Lin Xueyi's small waist. Lin Xueyi couldn't help but blush, and struggled slightly: "What are you doing?" ”

Dong Yucheng let go of his right hand in embarrassment: "I'm afraid you're freezing here." ”

With his sixth sense, Professor Wu found that the nearby magnetic field was wrong. This feeling comes from his years of professionalism and from his unique perception. Professor Wu took out the compass and saw the pointer moving, apparently the compass had failed. That said, it's not a deserted place, and they're not worried about getting lost.

On top of the cliff, there are dense stone balls, which are tightly embedded in the stones like rice balls boiled in a pot. Scattered mountain grasses grew from between the stone balls. Tiny droplets of water oozed from the cliff, dripping at a rate of one drop per second, and a stone ball was directly facing the tree below, which had dripped through the stone ball and mixed with the surrounding stone balls, like a fish's mouth.

"Professor, the old people say that these stone balls are Buddha beads. It is said that in ancient times, there was a general who led a righteous army on an expedition, but unfortunately lost the battle and passed through here, the people were tired, and the pursuers came, and the whole army was about to be destroyed. At this time, the Buddha appeared, scattered Buddha beads from the air, and smashed the pursuers behind, so that the army could be saved. In order to thank the Buddha for his great kindness, the general later built a huge Buddha statue and enshrined it all the time. This Buddha statue is on the other side of the mountain, and we will see it later. Lao Lu said.

As for Professor Wu, he naturally does not believe in these strange forces, all facts must be let by science, and all phenomena can be explained by the basic principles of physics. Professor Wu took out a bottle of hydrochloric acid from his bag and dripped it on the stone ball, which did not bubble, while the rocks in other places on the mountain road would bubble when they encountered hydrochloric acid.

"It seems that these stone balls are not limestone. Wu Jianjun, you take some samples, and we will bring them back to the laboratory for testing. Professor Wu said. Wu Jianjun took out a hammer, knocked a small stone, and saved it.

"Teacher, we may have made a fortune, I think these stone balls may be dinosaur eggs." Lin Xueyi used her brain, her eyes purred and turned, and she guessed the origin of these stone balls and came to this conclusion.

"Dinosaur eggs have been found in many parts of our country, and you are not saying that this is not possible." In order to verify Lin Xueyi's conclusion, Professor Wu took out a hammer and threw it at a stone ball.

"Teacher, slow down, if it's really a dinosaur egg, if you smash it down, we'll lose a lot." Lin Xueyi said. Professor Wu's hand holding the hammer stopped in the air, did he want to smash it or not?

"I don't think it's very likely that the stone ball is a dinosaur egg, if it was, it would have been stolen a long time ago." Wu Jianjun said.

Professor Wu thought the same way, he finally smashed the hand holding the hammer, and found that the stone balls were solid, not hollow, and did not have an egg yolk-like texture, it seems that these stone balls are not dinosaur eggs. In order to find out the mystery of the stone, Professor Wu led the expedition team to continue to look for clues.

"Teacher, look, there are a few big stone pillars in front of you." Dong Yucheng shouted. Sure enough, just in front of them, there were big stone pillars like five fingers standing tall, majestic and magnificent, just like the heavenly pillars that Sun Wukong saw in the palm of the Buddha's hand. Such a miracle, if not the work of nature, must be the masterpiece of the gods.

"Professor, I heard from the old people in the village that these five stone pillars are the fingers of the Buddha, and like the Buddha beads, they are all holy relics left by the Buddha to stop the pursuing soldiers and save the general." Lao Lu said.

Professor Wu still doesn't believe that. His attention was focused on the weathered fragments of the stone pillars. Standing under the pillars, you can see joints and fissures in different directions, cutting the rock into pieces of various sizes, but still sticking to the cliff wall and not falling off.

Although Lin Xueyi is not suitable for trekking in the wilderness due to the limitations of her physical strength, she is smart and loves to think when she encounters problems, and often comes up with many ideas that Professor Wu does not have, which is why Professor Wu brought her to the field. When Lin Xueyi saw these stone pillars, her head was running rapidly, and she had another idea.

"Teacher, these pillars may be volcanic rock, that is, the rock formed by the cooling of the magma emitted by the volcano. After a long period of weathering and erosion, these rocks continued to crumble and collapse, so there are these large stone pillars. Due to the effect of heat-expansion and cold contraction, wet expansion and dry contraction, it continues to expand, and many joints are produced. Lin Xueyi said to Professor Wu.

"Yes, quite possibly. Dong Yucheng, Wu Jianjun, have you thought of it? Why is Lin Xueyi the first to think of it every time? You also have to think positively. You are now in graduate school, and a lot of knowledge is not readily available in books, and you need to come to a new understanding of natural phenomena through your own observation, thinking, research, and summarization. Professor Wu said.

Lin Xueyi is younger than Dong Yucheng and Wu Jianjun, and when it comes to exploring the mysteries of nature, the two of them are indeed unable to catch up with Lin Xueyi, but they are not jealous. They cared for her and loved her like a brother.

Professor Wu took out his instrument to test the magnetic field near the stone pillar, and found that the magnetic field here was stronger than that on the side of the stone ball. Professor Wu speculated that the anomaly of the magnetic field may be related to the iron content in the volcanic rocks, which will need to be confirmed by experiments in the future. Professor Wu had the idea that the three graduate students could combine their knowledge of geology and physics to write their master's thesis. Nowadays, it is very difficult to choose the topic of master's thesis, and the topic of the graduate thesis of the previous graduates has a certain similarity, but now the topic is selected through interdisciplinarity, there is no problem of repetition detection, and it is easy to innovate. It seems that this scientific expedition is very valuable, and it is not in vain, Professor Wu can't help but feel proud in his heart.