What do your local dinosaurs look like, and what do dinosaurs look like?

My native dinosaur: Tyrannosaurus rex.

1. The Tyrannosaurus rex is 12 meters long, about 5 meters tall when upright, and weighs tons. It has a large head and a short neck, and its huge head has many holes to reduce the weight of its head. The teeth are dagger-shaped, about 18-20 cm long, with small serrations at the edges.

The jaw is strong, and when the Tyrannosaurus rex bites its prey, it pulls both sides of its jaw back to make the teeth cut deeper into the meat, and pulls back like a knife for cutting a steak to cut off the piece of meat.

2. The Tyrannosaurus rex was about a meter long, with two forward-looking eyes, a wide field of vision, and a small brain compared to a huge head, only a small cylinder about 35 cm long and about 8 cm in diameter. The olfactory lobe, optic nerve, and auditory nerve in front of the brain are all well developed, and the cerebellum and brain in the back are similar in size, indicating that Tyrannosaurus rex has a very sensitive sense of smell, and the sulcus gyrus on the brain is also relatively simple, indicating that it is not very intelligent.

3. The forelimbs of Tyrannosaurus rex are very small, with only two fingers with claws, some like small rakes, and its usefulness may not be great, but it is used to grab or pull the prey when eating the prey, or bend down to eat the food and use the front paws to support itself to stand up. Its hind legs are strong, supporting its full body weight, and its 3 clawed toes extend forward. Tyrannosaurus rex had a straight tail for balance and a quick stride, and could travel about 30-40 kilometers per hour and at least 15 kilometers per hour.

Different species of dinosaurs will have different appearances.

Most dinosaurs were much smaller than large sauropods. The available evidence suggests that the average size of dinosaurs varied throughout the Triassic, Early Jurassic, Late Jurassic, and Cretaceous periods. Most theropods weighed between 100 and 1,000 kilograms, while predatory carnivores in the Holocene were mostly between 10 and 100 kilograms.

Dinosaur weight estimates are mostly between 1 and 10 tons.

According to a study by the National Museum of Natural History in London, the average weight of dinosaurs was about 100 kilograms, while the average weight of Cenozoic mammals was between 2 and 5 kilograms.

From the existing skeleton in good condition, the tallest and heaviest dinosaur was the long-necked giant dragon (Giraffatitan Brancai, formerly known as Brachiosaurus bruceii). Fossils of the long-necked dragon were found in Tanzania between 1907 and 1912.

A skeleton model of a group of similarly sized individuals, which is on display at the Humboldt Museum in Berlin, is 12 meters tall and 12 meters long, and is expected to weigh between 30 and 60 tons of living animals. The longest dinosaur, the 27-meter-long diplodocus, was discovered in Wyoming, USA, in 1907 and is now on display at the Carnegie Museum of Natural History in Pittsburgh, Pennsylvania.

Physical characteristics of dinosaurs:

The physical characteristics of dinosaurs are inferred from fossils. According to paleontologists, dinosaurs were like living animals: some were big and some were small; Some walk on two legs; Some walk on four legs; Some eat plants, some eat animals; Some **smooth, some** have scales or bony plates.

The common similarities are that all dinosaurs had small brains and laid eggs on land (as is the case with all reptiles).

Dinosaur habits:

1. Foraging: The plants that herbivorous dinosaurs can eat are limited by their height, so some small herbivorous dinosaurs will stand on their hind legs in order to eat the leaves of plants in high places. Carnivorous dinosaurs fed on herbivorous dinosaurs and other animals.

The different foraging patterns of various dinosaurs are also reflected in their teeth.

2. Struggle: Sharp teeth and claws are the first to hunt for carnivorous dinosaurs. Tyrannosaurus dinosaurs often went it alone because they sought out lone herbivorous dinosaurs.

Some dinosaurs would move in groups, locking on to their prey and swarming and slicing open the prey's abdomen with the second finger of their claws.

Herbivorous dinosaurs generally had some special "equipment" to deal with the attacks of carnivorous dinosaurs, which sometimes consisted of tough leather armor, bone clubs, or bone spikes, and sometimes powerful tails. Such as mallet dragon and so on. Large herbivorous dinosaurs would act in groups, and when threatened, they would collectively hold their ground and fight back.

The above content reference: Encyclopedia - Dinosaurs.

Dinosaurs were very large, with a completely upright posture, their limbs built directly below their torso, and some dinosaurs had large tails.

Dinosaurs are a general term for a class of reptiles that appeared during the Mesozoic era, and most dinosaurs are portrayed by their athletic limbs, long tails, and large bodies.

Common features of dinosaurs include the absence of the posterior frontal bone, a low triangular crest of the humerus, and attachment to the sternoclavicular deltoid muscle; There is a protruding mass in the posterior part of the intestinal bone, and the acetabulum is perforated; The tibia has a broad terminal margin with a posterior flange; The talus has a distinct superior process that fits the tibia.

Dinosaurs have an upright gait, similar to most modern mammals, the thick wheel and most other reptiles have a gait with limbs extended to both sides, the dinosaur's hip fossa is facing both sides, and the fourth trochanter of the femur is to the inside of the buried tassel, the two fit, the femoral head is perpendicular to the femoral shaft, resulting in an upright gait, which is different from the upright way of the breech fossa downward such as Lloyd's crocodile.

The most famous dinosaur breed in the world – Tyrannosaurus rex:

Tyrannosaurus rex is a ferocious carnivorous dinosaur that lived in the late Cretaceous period, and is the largest known terrestrial carnivorous dinosaur, with a body length of 15 meters, a head alone that is meters long, and a body height of 6 meters, with a bulky, tall and flattened skull, with two large eyeholes, oval eye sockets, and extremely developed teeth.

The Tyrannosaurus rex belt is very well developed and extremely compact, not only the intestinal bone and the vertebrae are tightly healed, but the ischial bones and the distal ends of the pubic bone are also attached to each other; The distal pubic bone is enlarged and has a pedidal-like process, while the distal ischial bone is club-shaped. Such a thick belt structure indicates that its hind limbs are highly mobile.

Tyrannosaurus rex lived mainly in hilly areas and was mainly a predator of phytophagous reptiles. Due to changes in the surrounding environment, the Tyrannosaurus rex became extinct at the very end of the Late Cretaceous.

What dinosaurs look like: their leg bones are large and strong, enough to bear huge bodies. At the same time, they have evolved an ingenious construct that reduces the weight of other bones without attenuating their strength.

The smaller, fast-moving dinosaurs evolved a trait that can also be seen in modern animals: thin-walled bones. The bone resembles a hollow tube, with a thin outer wall made up of heavy bone, which is much lighter bone marrow.

Fast-moving herbivorous dinosaurs, such as Oak Tree Dragon, had this thin-walled long bone. We can assume that this skeleton is meant to reduce weight and thus gain greater speed when escaping from predators.

The term "dinosaur" refers to a dire lizard (a terrifying lizard) in the West, which was translated as "dinosaur" by Japanese paleontologists and later became popular in China. The ancient Greek word saurosc refers to large, lizard-like reptiles with limbs, tails, or wings.

The "dragon" in this context refers specifically to the Greek lizard family, such as the main dragon, tyrannosaurus, heterodontodontosaurus, diplodocus, Tyrannosaurus rex, pterosaurus, triceratops, etc. Just like the tiger word for "gecko" is a transfigurative nature.

Dinosaurs are not only lizards with long hind legs and short front legs, don't be so one-sided about dinosaurs, in fact, recent research on dinosaurs may have feathers, then dinosaurs are warm-blooded animals, not cold-blooded animals like lizards, and some dinosaurs do not have long hind legs and short front legs, such as Brachiosaurus. The front legs are long and the hind legs are shorter, so that you can reach the plants in high places. It can also be seen that dinosaurs are changing with the environment, and the larger the carnivorous dinosaur, the larger the plant-eating dinosaur.

As you know, the Tyrannosaurus rex is very **, so it is thought that the Tyrannosaurus rex abandoned its cubs when they were born, but research shows that they may have families like ours. (Tyrannosaurus rex may have lived in groups) Attention, this is a Tyrannosaurus rex.

Velociraptors, they are only 50 centimeters tall and 2 meters long, and although they are smaller, they live in groups and act systematically against prey up to 10 times their size.

Dinosaurs weren't the cold-blooded lizards we imagined, they were more like modern birds. Maybe it's not as brutal as we think, it's just our imagination.

I think dinosaurs look very similar to the lizards and monitor lizards and crocodiles of today.