Why could dinosaurs be the boss of the Mesozoic?

The world's largest dinosaur nesting site has a lot of information for scientists. For example, this is the first evidence that scientists have found that dinosaurs might have liked to nest near the sea. Dinosaurs preferred to nest near the sea, most likely because the soft sediment of the sea protected the eggs they laid and prevented them from breaking.

In the past, scientists have found juvenile dinosaur bones from marine sediments, but it is likely that they were fossilized by individual dinosaurs washed into the sea. The fossilized egg nests preserved in these coastal sediments found in Spain are the first definitive evidence of dinosaurs' nesting behavior by the sea. The upper limit of the Mesozoic Era was the Cretaceous-Tertiary mass extinction event, probably caused by the Chicxulub impact on the Yukatun Peninsula, which caused the extinction of 50% of all species, including all non-avian dinosaurs.

The world's largest dinosaur nesting site discovered so far is located in Spain, south of the European Pyrenees. Because the dinosaur nests, which are only about 1 meter above the surface, are so well preserved, paleontologists believe that the "newcomers" who came to the colony must not have trampled on the nests left by the dinosaurs who came here before, hence the overcrowded situation, which is usually less than 1 meter away from each other in the sandstone. Based on these facts, biologists speculate that dinosaurs must have been particularly fond of the area at that time, and came here to lay eggs and breed their offspring during the annual breeding season.

Regrettably, it has not been possible to identify the genus and species of dinosaurs that laid eggs in this area, as biologists have found only a few very broken fossilized bones here, which is not enough evidence to identify dinosaur genera and species. <>

The Earth used to be a kind of hegemon, but it was all extinct due to a meteorite impact. Then humanity becomes the new master. Although we can't see dinosaurs now, have dinosaurs ever seen us humans, have we ever lived with dinosaurs?

From the excavated dinosaur fossils, geologists have found that dinosaurs lived three centuries ago from now. They were the overlords of the time, because they were the strongest, the most diverse, the most widely distributed, and the most **, and lived on the earth for about 100 million years.

In the early and middle Triassic period, because of the scarcity of water resources on the earth, most of the small, fully evolved small reptiles replaced the large mammals and predatory dinosaurs, and there were some small dinosaurs in between, and later they were found in the sky and the sea.

Dinosaurs are huge species that existed hundreds of millions of years ago, and humans first appeared 5 million years ago, which means that humans could not have appeared in the world of dinosaurs. But some people believe that primates are the ancestors of all mammals, and that this species must have existed in the time of the dinosaurs, and that this race is the same species as the ancestors of us humans and ape-men 5 million years ago.

In 2007, Science wrote that flying monkeys may be the closest species to primates, and in 2010, some scientists believed that an important part of the origin of primates that disappeared 55 million years ago was the mammalian phantom mouse. Various realities suggest that our ancestors did live with dinosaurs 65 million years ago, but they were supposed to be small mammals at the time.

Even though there were no real people in the age of the dinosaurs, but they lived with the common ancestors of our current creatures, from another point of view, humans witnessed the disappearance and prosperity of the dinosaurs, in fact, this will definitely happen.

Human ancestors once coexisted with dinosaursIn 2002, a number of scientists in the United States published the latest research results on human ancestors.

Analysis: About 80 million years ago, the common ancestor of all primates (including humans) coexisted with dinosaurs and lived together in the same prehistoric era ——— the Cretaceous period.

After the conclusion of the study was published in the world's most authoritative scientific journal "Nature", it was like dropping a bomb in the world's scientific community. This astonishing conclusion, reached by the latest research methods, may rewrite the entire history of biological evolution. This discovery has absolutely significant implications for the history of biological development.

Previously, scientists had conventionally believed that the ancestors of primates originated about 55 million years ago, which is based on the oldest date. More than 80 million years have passed since the earliest primates appeared.

Based on this study, Briar, University of Pennsylvania, USA. Evolutionary biologists such as Haiji further believe that human ancestors ——— the earliest primates, and lived with the largest reptiles ——— dinosaurs in prehistory.

Before the extinction of the dinosaurs, primates and some other mammals had lived for tens of millions of years, while the extinction of the dinosaurs occurred about 65 million years ago. Tawane's team also suggested that the earliest primates may have been short in stature, nocturnal and living in tropical jungles.

Scientists believe that the catastrophe stemmed from an extraterrestrial meteorite that collided with Earth, wiping out almost all species on Earth at the time. However, Tavane theorized that some of the primates may have survived the catastrophe, and that one of them thrived and evolved into later humans. Of course, these are just scientific speculations, and there are no fossils to prove them.

The dinosaurs became extinct 10,000 years ago, when they ruled the Earth for more than 160 million years.

The earliest appearance of humans was the discovery of the bones of Australopithecus australopithecus between 4.4 million and 1 million years ago in Taon, South Africa, and the most important feature of the evidence confirming that he was a human ancestor is the ability to walk upright on two legs.

Between 2,000,000 and 1,750,000 B.C., Homo sapiens appeared in Tanzania and Kenya in East Africa, and on the basis of Australopithecus, they learned to make stone tools, and their brains were more developed through skulls, and their skills in walking upright were more proficient.

From 1.7 million years ago to more than 200,000 years ago, Homo erectus appeared, that is, the "Peking Man" in China, that is, the footprints of post-human beings have spread all over Asia, Europe and Africa.

200,000 years ago, early Homo sapiens appeared, that is, basically the living habits are similar to those of today's humans.

Late Homo sapiens, that is, modern man, appeared 100,000 years ago, and to some extent got rid of ape-man in terms of physiological and physical characteristics.

As for the other extinction of the Heidelberg Man, and later Neanderthals and some other early human races, they were exterminated in the course of historical reproduction for some reason, leading to their disappearance from history.

The earliest and earliest Archaeopteryx can be traced back to Africa 7 million years ago, and the dinosaurs were basically extinct as early as 65 million years ago at the end of the Triassic Period.

No, there can't be humans, after all, animals in the past couldn't directly evolve into mammals.

Hello, glad to answer for you.

The age of dinosaurs refers to the period when dinosaurs appeared and became extinct, from about 2.5 million to 66 million years ago, when dinosaurs and other ancient creatures took over the earth. They were one of the most important creatures on Earth about 2.5 million years ago, but it became extinct 65 million years ago.

So, was there anyone in the age of the dinosaurs?

There were no human beings in the age of dinosaurs because humans had not yet been born at that time, and before the dinosaurs disappeared, Indian humans appeared about 40,000 years ago and there was human existence. Therefore, it can be concluded that there were no human beings in the age of dinosaurs, and dinosaurs were the masters of the earth.

Although our knowledge of the age of dinosaurs is still limited, it is certain that although the age of dinosaurs is unknown, dinosaurs were the most spectacular and dazzling creatures of their time. There are also many unknown questions about the age of dinosaurs, and I believe that scientists will continue to work hard to explore. I hope we can find a satisfactory answer from this, so that the charm of the age of dinosaurs can continue to spread!

I didn't bury Tong suspiciously, at that time, the dinosaur bend hand was the master of the world and the earth, and there was no one who drafted the manuscript, and human beings didn't know what was going on.

In the age of dinosaurs, there were no humans, but there was the ancestor of human beings, Chunjian.

Dinosaurs were creatures that lived on the earth from 100 million years ago to 65 million years ago, and the earliest humans appeared 5 million years ago, which means that there were no humans in the age of dinosaurs. However, some scientists believe that the small mammals that lived 65 million years ago are the origin of primates, that is, the common ancestors of us humans and apes 5 million years ago.

Dinosaur habits

Sharp teeth and claws were 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 belly with the claws of their second toe.

Herbivorous dinosaurs generally have some special "equipment" to deal with the attacks of carnivorous dinosaurs, which sometimes consists of tough leather armor, bone clubs or bone nails, 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.

The above content reference: Encyclopedia - Humans.

The latest research by paleontologists published in Biology Letters found that human "ancestors" lived on the planet with dinosaurs. This "ancestor" was the first mammal to have a placenta. It lived between 88.3 million and 91.6 million years ago.

Mammals that now have placenta include humans and other mammals.

The prevailing view is that placental mammals emerged after the extinction of the dinosaurs. But researchers at UCL's Department of Genetics, Evolution and Environment suggest that the first placental mammals were likely contemporaries of the dinosaurs.

Researchers believe that these placental mammal ancestors were small, nocturnal, flexible and aggressive, and lived outside the impact range of comets that could have caused the extinction of the dinosaurs; Perhaps it was because of its small size and special living habits that it survived the mass extinction 66 million years ago.

The main reasons why dinosaurs dominated the Mesozoic era are:

1. Superior natural environment:

During the Mesozoic Era, the global climate was warm and wet, with little change in the four seasons, and the climate zoning was not obvious. The earth's crustal movement is in a relatively calm period, the terrain is relatively flat, there are many rivers and lakes, and the sail liquid vegetation is luxuriant. Such a natural environment is undoubtedly the Elysium of dinosaurs, which is very suitable for the survival and development of dinosaurs;

2. Compared with other reptiles, dinosaurs have a stronger competitive advantage

Dinosaurs had a fully erect structure of limbs and had a larger stride than any other animal. Because the hind limbs are longer than the forelimbs, it is inconvenient to walk on all fours, so many species often walk on two hind legs and run very quickly. The thick tail became a good balancing organ for dinosaurs to balance the weight of the front of the body;

3. Dinosaur morphology has strong evolutionary potential

In the early Mesozoic era, dinosaurs were still a very young group, they were vibrant, and had strong adaptability and evolutionary potential. The fully upright movement posture allowed the dinosaurs' bodies to no longer be oppressed from the ground, thus promoting the evolution of their organ systems such as the digestive, circulatory, and nervous systems, making them more capable of rapid movement and reactions.

After the appearance of dinosaurs in the middle of the Triassic period, they gradually became land overlords and began a long era of domination. A very interesting question is: why did dinosaurs rise to the throne?

Some people believe that the dinosaur family had a body structure and a more developed brain that other terrestrial vertebrates of the same period could not match, and with a stronger body, faster running speed and higher intelligence, the dinosaurs gradually defeated other animals and became the land masters of the earth. But later research found that these claims did not hold water. Some land tetrapods of the same period, like dinosaurs, were able to walk upright and run slowly, and their body structure was no worse than that of dinosaurs.

Some scientists have suggested that the dinosaurs were in fact "opportunists" and that their success was largely due to a rare opportunity to flourish. A closer look at the Triassic fossil record reveals that the diversity of dinosaur species and the number of individuals did not show a steady increase over time. On the contrary, the number of dinosaurs increased dramatically about 200 million years ago, tens of millions of years after their appearance.

In the early days of its birth, dinosaurs were very scarce, accounting for only 1% and 2% of the population of terrestrial vertebrates, but at the end of the Triassic period, there was a mass extinction event on the earth, and many animal groups withdrew from the stage of life on the earth, thus creating a large living space. Taking advantage of this opportunity, the dinosaur family developed rapidly, and soon occupied 50% to 90% of the population of terrestrial vertebrate species, becoming the land overlord.