Zhan Xiaogui was a little puzzled: "Could it be that what we just heard was auditory hallucinations?" ”

"What auditory hallucinations are not auditory hallucinations! I really heard the sound of some bird flapping its wings. Wang Yueyue said.

"Dad, where is the Zerg brood? Is it hiding in Liu Kui's base? Because I heard something flying flapping its wings! Zhan Xiaogui's son reminded Zhan Xiaogui again.

"Huh? Don't say it, look at the videos and pictures of three different birds or dinosaurs playing alternately on the wall of the Liu Kui base! Zhan Xiaogui's daughter-in-law was surprised.

"Hmmm! The picture is accompanied by text and explanation: The thorn bird is a strange animal that sings only once in its life. From the moment he left the nest, he was obsessed with looking for the thorn tree.

When it got its wish, it plunged its petite body into one of the longest, sharpest thorns, and sang with tears of blood and tears—the poignant and graceful singing voice that eclipsed all the sounds of the world in an instant! At the end of the song, the thorn bird finally died of exhaustion, and died a martyrdom - shaping the eternal beauty with a tragic tragedy, leaving people with a sad swan song. Zhan Xiaogui carefully studied the pictures of one of the types of birds that suddenly came out of the station on the wall of Liu Kui's base, alternating with each other and taking turns.

"What's going on? Didn't the Zerg Brood tattoo appear on this wall some time ago? Why are these three bird-like pictures now on display? What is the rationale for this? Could it be that the Zerg Brood is a bird from ancient times at all? Or does the Zerg brood have something to do with birds? Wang Yueyue was also confused, he didn't know what to do and what to say!

Out of curiosity, Zhan Xiaogui's son touched and photographed the pictures of the exhibition that appeared on Liu Kui's wall in turn a few times, and those pictures stayed and unfolded for people to see after being patted by their hands.

"What is this? A skeleton of bones! It looks like a super big bat that has been dehydrated and dried enough! Zhan Xiaogui ran to the base wall where the picture appeared, put his head close to the wall and looked at it again: "Mom! Why does this look like a squirt? It's not a mummy, is it? ”

Wang Yueyue listened and listened, the more mysterious it became, he simply activated the electrical attributes, connected to the unprecedented knowledge encyclopedia reserve, and learned the Zerg mother nest in his brain to start searching for what this kind of bone shelf was?

After waiting for dozens of minutes, with the sound of "beep" in my mind, the text corresponding to this kind of picture popped up all of a sudden, and the projection was mapped onto the wall where the sign of Liu Kui's base appeared just now.

The content is: The bird in this image is Archaeopteryx.

Archaeopteryx was similar in shape and size to a modern pheasant, and its ability to fly was probably only comparable to that of a modern pheasant.

The skull is enlarged, and there are grooved teeth in the mouth; The vertebral structure is very simple, the vertebral body is primitive biconcave, and all the vertebrae of the straight letter vertebrae can move freely; tail long, with many vertebrae, feathers arranged in two rows on both sides; The sternum is small and simple, celestial keels protrusion; The forelimbs have developed into wings, but they are not yet fully developed, with three fingers, the metacarpal bones are separated, the articular bones are complete, and each finger has a sharp claw; The ability to fly is not strong, and it is only suitable for short-distance tree-to-tree or tree-to-ground flights.

Many of Archaeopteryx's structures suggest that it had an intimate relationship with the Archaeosaurs, the girdle is related to the ornithischian rump, and the limb bone structure is similar in many ways to the carnivorous sauropods, suggesting that the Archaeopteryx originated from the Triassic two-legged alveolar tooth.

Whether the feathers on the hind limbs of Archaeopteryx are conducive to flight is currently debated.

Archaeopteryx is the size of a crow. It retains many of the characteristics of reptiles: such as teeth in its mouth, rather than forming the beak of modern birds; There is a long tail consisting of 21 caudal vertebrae; The three metacarpal bones of the forelimbs are separated from each other and have not healed into the metacarpal bones, with claws at the fingertips; There are no air pockets inside the bones; Wait a minute.

On the other hand, it already has feathers, and it already has the differentiation of primary flight feathers, secondary flight feathers, tail feathers, and compound feathers, which are characteristic of birds. In addition, it also exhibits other avian or transitional features in some skeletal morphology, such as the fact that its third metacarpal bone has healed with the carpal bone, but the second and first metacarpal bones have not yet healed, so some scientists believe that this reflects the beginning of the healing of the avian metacarpal bones into the carpal metacarpal bones. It is precisely because the characteristics of birds have evolved and developed on the basis of reptile characteristics that some people jokingly refer to birds as "beautified reptiles".

It is precisely because the skeletal structure of Archaeopteryx is very similar to that of a small carnivorous theropod dinosaur called a hyposteosaur, that it has long been believed that birds originated from the hypocoosaurs, and it is speculated that the high metabolic levels of birds were inherited from those dinosaurs, which means that some small carnivorous dinosaurs may have been homeothermic animals. It has also been speculated that the beginning of the development of feathers was not necessarily related to flight, and that it may have been prevalent in primitive theropod dinosaurs.

From the series of reptilian characteristics that Archaeopteryx has retained, it can be seen that its adaptation to flight is still very imperfect, so it is speculated that it can only glide at low altitudes. So, how did Archaeopteryx go from walking on land to gliding through the sky? Scientists have two opinions on this.

One opinion is that it was originally an animal that was good at running. Starting with running, the forelimbs are used to beat the air to increase the speed, and the mutated type of primitive feathers on the forelimbs gradually perfected in the process of adapting to this habit, and finally develops feathered wings, which begin to glide off the ground and into the air by flapping the wings. This theory is called the "running theory" of the origin of bird flight.

Another opinion is that Archaeopteryx was originally arboreal and that gliding with feathered wings in trees was a favorable mode of activity, which gave the mutated type of primitive feathers on the forelimbs that changed from scales to more opportunities to survive and reproduce, and finally developed into feathered wings and gained the ability to fly. This theory is called the "arboreal theory" of the origin of bird flight.

Later, according to the fifth specimen of Archaeopteryx, it not only had claws on its wings, but also sharp and curved claws at the end of its hind toes. This kind of claw is not good for running and good for climbing branches, which seems to support the arboreal theory. ”

"I went, and I got it for a long time, which means that this is the oldest bird, the Archaeopteryx! At this juncture, these long-extinct birds appeared, could it be that these birds are going to be resurrected or something? This bird is from the Jurassic Park period, is it possible to say that the age of dinosaurs is going to return? The latest chapter of the "Super Supply Box Claw Book House" is free to read for the first time.