"If the earth is described as a person, then the earth has existed for nearly 4.6 billion years, and if there are no external forces, such as planetary collisions, then the earth will die, and scientists estimate that this time will be about 5 billion years later, so from now on, the earth is in its prime." Zhao Qingcheng opened a relatively large topic.

"The so-called evolutionary history of the earth, in general, is the evolutionary history of living things, from the earliest formation of the earth called the Archean universe, this time can be skipped, because there is no life, and then the Archean period, the time is about four billion to two billion billion years ago, there have been organisms in the late period, this is fungi and algae, and then to five hundred million years ago, these organisms began to multiply in large numbers, and in the late period there have been invertebrates, which is the earliest century of the earth."

"Then there is the Paleozoic Era, which ended 250 million years ago, divided into six families, fish and amphibians have begun to appear, pine and cypress plants have also existed, after the Paleozoic Era is the Mesozoic Era, which ended 65 million years ago, this era is also familiar to you, it is the so-called dinosaur age, mammals and birds also appeared in this era, and then there is the Cenozoic Era, the Cenozoic Era has continued to this day, some creatures have risen, some creatures have gone extinct."

"The Agloman dragon grass grew 30 million years ago and then became extinct 25 million years ago, so this grass also belongs to the Cenozoic plant?" Qiubai asked.

"Yes, the Agloman dragon grass is a plant of the Cenozoic era, and many things happened in the Cenozoic era, which led to some faults in civilization, and the main time of occurrence was from 30 million years ago to 25 million years ago, countless species of organisms suddenly became extinct, and scientists have not yet found the reason, and we call this period the lost century."

"The Lost Century? There must be quite a lot of civilization faults caused by unknown reasons like this, right? ”

"Well, it's a lot, but the Lost Century is the most important, and it can even be said that if the Lost Century hadn't happened, maybe there would have been no appearance of our human race at all, Brother Qiu, looking at the evolutionary history of the earth, did you find one of the common denominators?"

"What do you have in common? Does it mean that all living things are evolving? Qiubai asked.

"Almost, they are all evolving, from the algae of the Archean, to the fish and amphibians of the Paleozoic, to the dinosaurs of the Mesozoic, to the lost century of the Cenozoic, all living things are going on, many scientists have found a very amazing fact, that is, animals are getting bigger and bigger, plants are getting taller and taller, scientists believe that if there is no Lost Century, animals hundreds of meters high on the earth should be very common now, and there should be many giant trees thousands of meters or even tens of thousands of meters high, but the Lost Century does not know what happened, It's like a storm that cleans the earth, causing civilization to start breaking, and then civilization starts to develop in the other direction. ”

"And this kind of thing?" Qiubai thought about it, and thought that Zhao Qingcheng's words were quite reasonable, the Paleozoic Era, that is, the age of dinosaurs, the size of the organism was already quite tall, and the largest dinosaur fossil found was a seismosaurus, according to scientists, it was believed that this seismosaur was forty to fifty meters long, eighteen meters tall, and weighed one hundred and thirty tons.

"At the end of the Paleozoic Era, I remember that it was the comet that hit the earth, causing the earth's volcanic eruption and then the earth's gravity suddenly increased, and at that time it should be regarded as a fault line of civilization, right?" Ning Yan was a little puzzled.

"This is a statement that is more recognized, and there are many other theories, but even if the dinosaurs are extinct, there are many kinds of creatures that survived and became prosperous in the Cenozoic, such as crocodiles, called dinosaurs at that time, and the size of dinosaurs is also extremely large, although not as good as dinosaurs, but there is little difference, and dinosaurs did not become extinct with dinosaurs, until the lost century is really extinct, modern crocodiles are far away from dinosaurs in terms of body shape and predation ability."

"You mean if there wasn't a lost century, then all crocodiles would have been dire crocodiles by now?"

"That's not what I meant, but many scientists think so, the life span of the dinosaur is long, up to nearly a thousand years, and according to Darwin's theory of evolution, if there is no lost century, an adult dinosaur can grow to a length of 800 meters in modern times."

"It's too big, isn't it? So what do they eat? Oh yes, if there is no Lost Century, surely all living things will evolve, maybe a cow can grow to five or six hundred meters, and there will definitely be no shortage of food, oh, no, what about plants? There have to be plants to feed those herbivores, right? Can plants grow thousands of meters tall? Isn't this scientific? ”

"How tall can a plant grow? This is something that no one can say clearly, but if you look closely, you can actually guess a thing or two, for example, growing in a rocky place, plants must be relatively short, in fact, most biologists believe that how big a plant can grow depends not on water, the surrounding environment, but on the internal environment of the earth? ”

"Earth's interior?" Qiu Bai asked word by word, he really didn't understand now.

"For example, if a tree is a thousand meters high, how deep do you think the roots of that tree should be in the ground?"

"A thousand meters? Then the roots of this tree need to be at least six or seven hundred meters, or deeper, after all, it has to withstand the wind and rain, and the roots are definitely not deep. ”

"What if it's 10,000 meters tall?" Zhao Qingcheng asked.

"That's six or seven thousand meters."

"What about 100,000 meters?"

"Sixty or seventy thousand meters."

"Okay, even if it's 60,000 meters, it's 60 kilometers in kilometers, and 60 kilometers underground, how high this temperature is, I guess Brother Qiu also knows, there will be no roots of plants that can survive in this environment, so how tall the plants can grow depends not on anything else, but on the internal environment of the earth."

"It seems to make sense, but according to the current temperature of the earth's mantle, no plant can break through a thousand meters of height, right?"

"It's really not, according to the research of scientists, the temperature of the inner core of the earth should be a slow cooling process, in the lost century, the earth should have been able to appear thousands of meters tall plants, we also guess that it should have appeared, but for unknown reasons, the temperature of the earth suddenly became higher again, this is like a big hand suddenly stifled the evolution of organisms on the earth, plants can not become luxuriant, and the herbivores that rely on plants to survive will also maintain a balance in quantity, and then the same is true for those who eat meat, So for scientists, the importance of the Lost Century is undoubted, we are eager to know what happened to the Lost Century, what caused it, and whether it is possible to recover, there is no confidence in the original, I can't imagine that we have found the Lost Century Yagreman Dragon Grass here, if this is true, Brother Qiu, what a huge sensation this will cause in the biological world, do you know? ”

"I don't really want to know how much of a sensation it caused, I wonder how tall do you biologists think plants on Earth would be if there were no faults in civilization?"

"Many scientists believe that if there is no fault line in civilization, that is to say, there is no Lost Century, and at the end of the earth's life, there will be a giant tree, the roots of which can encompass the earth, and the height can probably grow to the moon, and if the tree is a transplanted plant, then it can even re-take root on the moon, relying on the moon and the earth, plus the new stars formed over billions of years, this giant tree may be able to extend to the sun." Zhao Qingcheng gave Qiubai a very imaginary imagination.

"These are all guesses by biologists? Or maybe it's your guess? Qiubai asked suspiciously.

"Be bold and hypothetical, researchers can't be limited to one point, and sometimes imagination is also very important." Zhao Qingcheng said dissatisfied.

How far the thought is, how rich the imagination will be, I have to say that Zhao Qingcheng's idea is indeed very imaginative, but who will know what will happen in the future? Maybe there was a moment when a miracle happened.

PS: Wow, it's already signed.

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