After getting on the boat, he went to wipe the seawater on his body, and just after changing his clothes, he heard Professor Yin's voice on the boat: "Xiao Ao, Xiao Ao, where are you?"

Lu Wuyi's voice sounded: "Professor, what do you tell me, the same." ”

"Is it the same? I'm going to ask Xiao Ao something, it's very important. ”

"That's absolutely the same, ask what? I know everything my brother-in-law knows. ”

"Where did this turtle fossil come from?"

"Nautical. ”

"I know the nautics, I mean, that location? What's around?"

"This ghost knows. Ao Muyang walked out of the cabin just in time to see Lu Wuyi spread out his hands and looked helpless.

He slapped Lu Wuyi's head and said dissatisfiedly: "You, get out." ”

"Yes, brother-in-law. Lu Wuzhi responded very happily.

Professor Yin was very happy to see him, took his arm and asked, "Xiao Ao, Xiao Dou and Xiao Song said that you fished this fossil from the sea?"

Ao Muyang roughly recalled, pointed to the direction in front of him and said: "Yes, it was fished up from over there, I saw a turtle fossil underwater, and I thought it might be useful, so I fished it ......."

"Your feeling is so accurate, it just works!" Professor Yin slapped his thigh excitedly.

Ao Muyang was happy in his heart and asked, "That's great, what's the use of it?"

Professor Yin said: "I can't say exactly what I can say now, because what I see is a mutilated fossil, but I can also tell you a little bit, first of all, you know that whether it is a tortoise or a sea turtle, the shell is used to protect the body, right?"

Ao Muyang nodded: "That's right." ”

Lu Wuyi said not far away: "I know this, when the turtle encounters danger, it will shrink into its hard shell, which is called shrinking the turtle into the body, and it is a defensive technique in martial arts." ”

"Don't mess around, fuck off. ”

"I didn't make trouble, brother-in-law, I also want to learn, I also want to improve. Lu Wuxian said aggrievedly.

Professor Yin waved his hand and said, "Xiao Ao, don't treat Xiaolu with such a bad attitude. ”

He felt good about the deer, so he said to him, "You are not right, tortoises have a habit of retracting their limbs and heads back into their carapaces, and turtles can't do that. ”

"That's right. Lu Wuzhi's face was stunned.

Professor Yin continued to say to Ao Muyang: "Actually, there is a speculation in the reptile community that the turtle shells evolved from primitive turtles were not used to contain the body to hide from natural predators. Because in the era of two or three hundred million years ago, there were a large number of large fish and animals in the ocean and on land, and the common characteristic of these big men was that they had a strong bite force. Turtle shells can keep most of the world's fish and animals attacked, but at the time they couldn't stop the terrifying predators. ”

"So, guess what the turtle shell was used for in the first place?"

"Since it's not for defense, it's for offense?"

Ao Muyang was at a loss, how could this turtle shell be used to attack? The turtle jumped up after discovering the opponent, and then smashed them with the turtle shell?

"It's not for offense, it's not for defense, you continue to guess what they evolved this turtle shell for?" Professor Yin said with a smile, "Hint, turtle shells are indeed used to save lives." ”

"They can't attack or defend, that's to help? Can they regenerate health? Can they heal their kind, can they hide themselves?"

Ao Muyang stretched out his hand and wanted to pump him again, this thing is not messing around and uncomfortable.

As a result, when he heard his last sentence, the old professor slapped his thigh and said excitedly: "Guess right!"

Lu Wuxian looked confused: "Which one is right?"

The old professor patted him on the shoulder and said, "Good boy, I know that you are clever and really live up to my expectations." ”

Lu Wuxian hurriedly held his head high and made a confident appearance, as if he had just overcome some world problem.

Ao Muyang didn't bother to pay attention to him, and asked Professor Yin, "What is this turtle shell for?"

Professor Yin said with a smile: "Didn't the little deer say that it is used to hide itself, and the ancient turtle uses it to dig a hole to hide. ”

"Yes, to hide yourself. Lu Wuji nodded decently, as if he knew it well.

Ao Muyang was drunk.

Professor Yin didn't say anything more to him, he urged: "Xiao Ao, can you go to the sea again to look for other fossils? This thing is very precious, let's go back to Professor Li as soon as we find it, he is the expert." ”

Ao Muyang said: "Okay, then I'll bring tools, there are other fossils embedded in the granite on the bottom of the sea, it's not easy to take them down." ”

"If you want to get the whole stone out, don't try to dig it out, you have to rely on professional people and professional tools. Professor Yin hurriedly advised.

Ao Muyang nodded and said, "I know this." ”

He found tools such as hammers, iron crowbars, and harpoons on the boat, and then took two PhD students with good diving skills to the sea.

The location where the fossils were found was not far from the research ship, and the sea water was not too deep, less than 30 meters.

After they dived down, Ao Muyang found the fossil and took the two of them to start prying the stone.

In addition to the complete fossil he had found at first, he searched for it later, and before the sun set, he found two more turtle fossils, but they were all mutilated.

Seeing these three fossils, especially the complete fossil, Professor Yin was so excited that he didn't even eat dinner, and immediately took a magnifying glass and an atlas to lie on the stone and study it.

The scientific research ship returned early, and Lu Wuji was very happy.

Ao Muyang went to call Professor Yin to eat, and the old man shook his head: "You eat first, and when I return to the village and let Lao Li invite me to eat, he must invite me to a big meal." ”

"Did you find anything?"

Professor Yin smiled: "Yes, first of all, I am not mistaken, you happened to come across the fossil of the ancestor of the modern turtle, the original turtle, do you know?"

Ao Muyang shook his head: "It's the first time I've heard of it." ”

Professor Yin said: "Well, then let me briefly introduce to you, the original turtle is the ancestor of the modern turtle, but its appearance is a little different from the modern turtle, the tortoise shell on the ventral surface of their body has been fully formed, but only half of the carapace on the back, there are teeth in the mouth, and they lived about 250 million or 60 million years ago. ”

Ao Muyang asked, "The carapace of the original turtle was only half at first, because if you want to dig a cave, you don't need the whole carapace, right?"

Professor Yin nodded: "It should be so, but evolution is a very complex process, and we need rigorous research and sufficient evidence before we can draw conclusions." ”

"The fossils that we've found are very important, because their shells are larger than the ones we've found in the past, and the sharp curvature has been eased, so what does that mean? We probably found a bridge between the protototoise and the modern tortoise, which is important not only for reptile research, but for evolution as a whole!"

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