About where the North and South poles were in the age of dinosaurs

Dinosaurs were once at their peak on Earth, in the Jurassic period.

In the era, dinosaurs were the rulers of the earth. Now, through various fossils, people have learned that there were many kinds of dinosaurs that lived in that era. Well, in the inaccessible and harsh Arctic regions.

Have there ever been dinosaurs? The answer is yes, there are dinosaurs in the North and South poles. <>

The name dinosaur was first officially named by British paleontologists, and the earliest dinosaurs were shaped into cold-blooded, sluggish, rampaging lizards that lived in a warm environment all year round. However, with the continuous development of dinosaur research, dinosaur fossils have been found in both the Arctic and the Antarctic.

For example, the famous Antarctic ankylosaurus and ice cap. Scientists.

Slowly, it was discovered that many dinosaurs were warm-blooded animals, which is what we are familiar with at room temperature, so scientists brought a question, how did polar dinosaurs live at the poles all year round? Did they migrate or how did they reproduce locally? <>

With a fossilological study in 2021, the secret was officially unveiled by scientists in Alaska.

The discovery of the northernmost dinosaur fossil site on Earth to date, which is rich in juvenile dinosaur bones, has helped us unlock the secrets of dinosaur reproduction and development, bringing new understanding. Hundreds of dinosaur bones have been found at the site, and scientists have carefully selected them after 30 years of field research to find that most of these dinosaurs were in the hatching and juvenile stages, no doubt in the Cretaceous period of the Arctic Circle.

Inside, there are still many dinosaurs breeding and nesting here. <>

And according to the results of scientists' research and research, in the era of dinosaurs, the average temperature of the earth was not as low as now, especially in the early Cretaceous Arctic region, the average annual temperature was about 10 degrees, the temperature can be guaranteed, and there will be other animals in the Arctic, they also have sufficient food**, and will not be because of the extreme weather in the Arctic.

and lose viability. With the continued excavation of dinosaur fossils in the polar regions of the earth, we are getting closer and closer to revealing the life of polar dinosaurs, and it is foreseeable that we will learn more about dinosaurs in the future.

It's there. Many dinosaurs were endothermic animals, and there were no glaciers in the Arctic and Antarctic, so they would have lived there.

There have been dinosaur fossils found here by previous expeditions, such as Ankylosaurus antarctica and Glacilosaurus.

According to the relevant previous research findings, the Australian continent in the Cretaceous or early Qing period belonged to Antarctica, and many fossil specimens of dinosaurs were found, but no specimens of related dinosaur fossils were found in the Arctic, and it is not certain whether dinosaurs appeared in the Arctic.

The earliest appearance of dinosaurs x0d As we all know, dinosaurs ruled three geological epochs for a total of 165 million years. However, during the Triassic and early Jurassic periods, dinosaurs still did not become a very powerful species, almost completely dominating the entire evolutionary process of animals. By the end of the Jurassic period, very large sauropods had become the largest creatures ever on Earth.

The end of the Jurassic period was the peak of their domination of the earth, and they far surpassed other creatures of the same period in terms of diversity, intelligence, and size. How did the most legendary species in the history of the earth come to be, and how did it rise? x0dBefore the appearance of dinosaurs, lizard-type species appeared on the earth, and although they were not as large as dinosaurs, they had a certain advantage over other animals at that time.

Paleontologists believe they were the prototypes of the dinosaurs that came later. Lizards appeared in several geological epochs before the Triassic – the Carboniferous period (100 million to 100 million years ago). In that time appeared what is believed to be the world's first reptile :

West Lothian lizard. By the Permian period, a geological epoch before the dinosaurs, reptiles were becoming more diverse and closer in shape to those of the earliest dinosaurs. The Permian was a relatively arid era, and deserts were common.

During the same era, lizards living in groups like the Ichirasaurus and Heterodontosaurus were active in desert oases. During the Late Permian, there were two distinct trends in the evolution of life, both of which had profound implications for the history of the Earth. One of these trends is called dinosaurs, and the other is called mammals.

X0d Just as Earth's evolution was in full swing, an asteroid larger than the meteorite that ended the age of dinosaurs 65 million years ago hit Earth at the end of the Permian period. The impact caused the extinction of most species, but it also served as a catalyst for the emergence of dinosaurs. During the Permian period, the real dinosaurs were about to make their official debut.

One of the earliest dinosaurs to appear, the Black Reisaurus was small and agile, quickly becoming a big winner in survival games. By the end of the Permian, the Cavinosaurus appeared, which was the prototype of many carnivorous dinosaurs and birds. Soon in the Jurassic period, the early Jurassic herbivorous dinosaurs began to evolve in size, and the advantage of size could help them escape the pursuit of carnivorous dinosaurs.

Hence the emergence of sauropod dinosaurs; The huge sauropod class pushed dinosaur evolution to its highest peak. Another reason for the emergence of large sauropod dinosaurs is the climate, according to geological records, the late Jurassic period was warm and humid, and dinosaurs could grow to more than 30 meters long. In addition, carnivorous dinosaurs have also become larger, more aggressive and threatening; For example, Allosaurus in North America.

In addition, very special dinosaurs, such as the feathered Chinese dragon bird, began to embark on the path of bird evolution. Under the influence of climate and living conditions, the end of the Jurassic period was the heyday of the Dinosaur Age.

Middle and Late Triassic to the end of the Cretaceous.

Dinosaur (English name: dinosaur) refers to the most recent common ancestor of Triceratops, modern birds, and Diplodocus and all their descendants. To facilitate research, dinosaurs can be divided into avian and non-avian dinosaurs.

Among them, non-avian dinosaurs lived only in the Mesozoic era (Triassic, Jurassic and Cretaceous) and were all extinct 65 million years ago. This entry mainly introduces non-avian dinosaurs.

The muscular limbs, long tails, and massive bodies are some of the non-avian dinosaurs. They mainly inhabit woodlands or open areas on lakeshore plains (or coastal plains). In 1841, when British scientist Richard Owen studied several fossilized lizard bones, he believed that they were left by some prehistoric animal and named them dinosaurs, which means "terrifying lizards".

Skeletal characteristics of dinosaurs:

For large herbivorous dinosaurs, strength was the most important requirement. Their leg bones are large and strong, large enough to bear a huge body. 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. <>