The original meaning is "flying reptile". Pterosaur, which appeared on the earth in Mesozoic Triassic, was the first flying vertebrate, but some people suspected that it was just an empty name and could only glide in the sky at best. However, the latest research shows that pterodactyl can not only fly like a bird, but also be a flight expert because the developed nerve tissue in the brain processes balance information. Researchers at Ohio University in the United States reported in the latest issue of Nature that they used computerized tomography technology to construct a three-dimensional image of pterosaur brain based on fossils. The image shows that the cerebellar lobe of pterodactyl is quite developed, and its mass accounts for 7.5% of the brain mass, which is the highest proportion among known vertebrates. In contrast, the cerebellar lobe of birds who are good at flying only accounts for 1% to 2% of their brain mass. The largest pterodactyl is pterodactyl. The spread wings are12m long. The world's first pterodactyl embryo fossil was recently discovered by paleontologists Dr. Wang Xiaolin and Dr. Zhou Zhonghe in the Jehol biota in western Liaoning, China. In June this year 10, related research papers were published in the most famous academic journal in the world-Nature. Because of this great discovery, Nature also distributed relevant news reports and pictures in the "Today's News" column on the homepage of its website. This importance was also reported in the American magazine Science published on June 1 1. Because of the discovery of such an extremely precious fossil, people today have obtained strong evidence that the Mesozoic air overlord pterosaur, which appeared and died out at the same time as dinosaurs, flew into the blue sky about 70 million years earlier than birds, not viviparous, but laid eggs like other reptiles and birds. Brachiosaurus dinosaur body length: 23 meters long and 12 meters high; Dinosaur weight: 77-80 tons; Dinosaur food: herbivores eat leaves at the top of trees; Survival years:10.45 billion-10.56 billion years ago; Residence in the late Jurassic: Grand Canyon, Colorado, USA; Identification of Tanzania in Africa: Tail. Jane: Brachiosaurus is one of the tallest and largest dinosaurs. It has a long neck, a small head and a stubby tail. Walk on all fours. Brachiosaurus' front legs were longer than its rear legs. Each foot has five toes. There are claws on one toe of each forefoot and three toes on each hind paw. Brachiosaurus' teeth were straight and sharp. Brachiosaurus's nostrils grew on the top of his head. Brachiosaurus had a small head, so it was not very clever. They live in groups and go out together. Brachiosaurus didn't make nests when it gave birth to young dinosaurs, but gave birth while walking, so these dinosaur eggs formed a long line. Brachiosaurus didn't look after his children. When they eat, Brachiosaurus swallows the whole food without chewing. Brachiosaurus is one of the largest and heaviest dinosaurs ever. A man's head can only reach the knee of this monster. It has a huge body, a long neck, a small head and a long tail. A huge and strong heart kept pumping blood from the neck of Brachiosaurus to its cerebellum. Some scientists think it may have several hearts that send blood to all parts of its huge body. Along the cervical spine, well-developed muscles help support its head. Unlike other dinosaurs, brachiosaurus had longer front legs than its rear legs, which helped it support the weight of its long neck. Brachiosaurus ate the young leaves on the treetops, which other herbivores could not reach. With its long neck, it can pick the tallest leaves. So do giraffes today. Brachiosaurus had a well-developed jaw, like a sharp-edged spoon-shaped tooth, which could pinch off twigs and tree buds. Brachiosaurus needs to eat a lot of food to supplement the energy needed for its huge body to grow and move around. An elephant can eat about 1500 kg of food a day, and brachiosaurus can eat about1500 kg a day, which is ten times the food intake of today's behemoths! It may wander in groups on the endless prairie every day, looking for fresh trees. Brachiosaurus is one of the large dinosaurs, which lived in Jurassic period. You can easily see the difference between it and other dinosaurs from the fact that its forelimbs are longer than its hind legs. Its shoulders are about 5.8 meters off the ground, and its head is about 12 meters off the ground when it is lifted. Although it may feed on branches and leaves of tall trees, some scientists don't think it will keep its head up for a long time-that will make it difficult for it to send blood up. Brachiosaurus was the largest land animal in history. Although dinosaurs such as super dragon, dragon and earthquake dragon have been dug up, it is still uncertain because no complete skeleton has been dug up. Brachiosaurus, Lei Long and Liang Long all had nostrils on their heads. It is easy for such a tall animal to feed on the branches and leaves of big trees. Like other giant herbivorous dinosaurs, it has a long neck and a small head, and the mound above it is its nose. Brachiosaurus had high forelimbs, hunched shoulders, and the whole body leaned back along the shoulders, which can still be seen in some tall animals such as giraffes. Dinosaurs are the general name for reptiles on the earth10.3 billion years ago. There are many kinds of them, and their size, shape and living habits are different. Land, sea and sky are all sites of dinosaurs and reptiles. As big as Mamen Xilong found in Hechuan County, Sichuan Province, China, it is 22 meters long, 3.5 meters high and weighs 40-50 tons. Usually living in a lake with a water depth of 5 ~ 10 meters, using the buoyancy of water to float the heavy body and feed on algae in the water. The whole body of the parrot dragon is only the size of a puppy. Some can fly in the air, such as long-tailed beak dragon, with sharp teeth and long tail. At the end of the tail, there is a membrane shaped like a fly swatter, and the flying tool is the wing membrane. Some are overlords in the sea, such as Himalayan ichthyosaurs, which eat meat and are good at swimming. Its upper and lower jaws are particularly long, forming a long kiss, with teeth in its mouth, and its shape is very similar to that of dolphins today. Some warriors on land, such as Stegosaurus, were 6 meters long, with small heads and high arches on their backs. There are two rows of upright triangular bone plates with bone spurs at the tip of the tail, which are weapons against the enemy. By about10.3 billion years ago, the dinosaurs that ruled for a period of time were completely extinct on the earth due to the changes of topography and climate caused by strong crustal movement. The reason for the extinction of dinosaurs is still inconclusive, but it should be noted that the reasons are various and complicated, which is the result of the interaction between the external environment changes and the internal factors of dinosaurs at that time.