Why did the dinosaurs go extinct so clean? Why did the dinosaurs go extinct so clean?

Scientists according toDinosaur fossilsThe age of the rock indicates that the dinosaurs last went extinct 65 million years ago. But forDinosaurs became extinctThe specific reason, no one knows the answer.

Dinosaurs were large in size overall. By the standard of dinosaurs, sauropods are the giants of them. In the long age of dinosaurs.

Even the smallest sauropod dinosaurs were larger than the rest of the animals in their habitat, while the largest sauropods were several orders larger than any animal that appeared on the surface.

Most dinosaurs were much smaller than large sauropods. The available evidence suggests that the average size of the dinosaurs was in the Triassic.

Early Jurassic. Late Jurassic and Cretaceous.

are constantly changing. Most theropods weighed between 100 and 1,000 kilograms, while predatory carnivores in the Holocene were mostly between 10 and 100 kilograms.

Struggle. Sharp teeth and claws were preyed upon by 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 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.

It is not extinct, but only changed its form to survive, and most of the reptiles and amphibians are the descendants of the evolution of some dinosaur species.

There are three conjectures about the extinction of dinosaurs, namely: climatic causes, planetary impacts on the earth, and volcanic eruptions. Scientists have calculated the last extinction of dinosaurs based on the age of the rock where the dinosaur fossils are located 65 million years ago, and no one knows the answer to the specific cause of the extinction of the dinosaurs, so they can only speculate.

Climatic causes: There was a huge change in the Earth's surface that changed the Earth's climate so much that the dinosaurs became extinct due to lack of food.

Planets hit the Earth: Some scientists believe that 65 million years ago, a huge asteroid hit the Earth, and a large amount of soot entered the air, causing plants to stop growing, and the subsequent outbreak of air pollution, food shortages, disease, etc., led to the extinction of the dinosaurs.

Volcanic eruption: Volcanic eruption produces a large number of toxic gases and harmful substances, and also causes secondary disasters such as ** and tsunamis, which can not only directly kill dinosaurs, but also cause long-term pollution to the surrounding environment, affect the reproductive function of dinosaurs, and cause dinosaurs to hatch significantly and become extinct.

Because an asteroid hit the earth, it caused the dinosaurs to go extinct.

In 1980, Nobel laureate in physics Louis Alvarez, his sons Walter Alvarets, Frank Asaro, Helen Michel and others found that the global Cretaceous and Paleogene strata had higher levels of iridium than normal.

For example, the iridium content of the two formations in the original study was 30 times and 130 times the normal standard, respectively. Iridium is a very rare metal in the earth's crust and is an ironphilic element.

Most of the ferrophilic elements settle into the Earth's core, such as iron, during the planetary differentiation. Since iridium is often found in most asteroids and comets, Alvarez et al. believe that an asteroid hit the Earth's surface at the beginning of the Cretaceous and Paleogene periods.

Dinosaur development history:

Dinosaurs flourished in the Mesozoic Era, dominating for a while, and the earth became a world of "dragons". For example, the winged dragon flying in the air, the forelimbs become flying organs, the ichthyosaur that lives in the water, the Lufeng dragon that lives on land or in the swamp, and the Hechuan Mamenxi dragon are all typical representatives. Non-avian dinosaurs lived on Earth for hundreds of millions of years, and a branch of theropod dinosaurs branched off into birds, but at the end of the Cretaceous period, they suddenly disappeared from all parts of the world.

This is due to the strong orogeny, changes in topography, climate and food shortages, etc., the ancient reptiles, dinosaurs, which dominated the earth for more than 100 million years, were completely extinct at the end of the Mesozoic Era.

65 million years ago, a huge asteroid hit the earth, causing the extinction of the dinosaurs.

The extinction of the dinosaurs was caused by the impact of a huge asteroid on the Earth 65 million years ago, which caused a huge amount of dust to obscure the sky and the sun, causing global climate change and the death of a large number of animals and plants, and the dinosaurs were not spared.

At that time, the asteroid that hit the Earth was about 10 kilometers in diameter, and the impact point was located near Chicxulub in today's Yucatan Peninsula in Mexico, and according to scientists' estimates, the energy released by the asteroid impact was equivalent to the detonation of millions of the most powerful hydrogen bombs, the "Tsar Bomba" (the power of one Tsar Bomba is equivalent to 50 million tons of TNT equivalent).

The real reason for the extinction of the dinosaurs

However, it is incomplete to consider the consequences of this asteroid from the perspective of hydrogen bombs, because the mass and size of the earth are far above this asteroid, which means that the damage caused by the asteroid impact itself is limited, and it will only cause the rapid death of organisms in the area near the impact site, but will not lead to the death of species distributed around the world.

The real reason is the aftermath of the asteroid impact – "dust", huge amounts of dust that were thrown into the atmosphere, although the dust did not have any immediate adverse effects at the time.

But the worst thing is that the dust moved with the atmosphere, distributed around the world, and lasted for several years, and within a few years, because the dust prevented sunlight, a large number of plants died, and the dinosaurs at the top of the food chain at that time were greatly affected, and finally ended up extinct.

Most scholars in the world believe that about 65 million years ago, the dinosaurs that dominated the earth for more than 100 million years were all extinct. However, there are also many people in the international academic community who disagree, they believe that the dinosaurs were not completely extinct. They hope to find live dinosaurs on Earth.

In 1981, the American Reggist expedition entered the swampy area of the Congolese primeval forest. According to them, they have seen the faces of living "dinosaurs" five times and heard their cries six times. They filmed the animal and recorded their voices.

The expedition also brought back some dinosaur vertebrae skeletons, skulls, and complete lower leg bones. It has been determined that it was formed only 100,000 years ago. This challenges the idea that dinosaurs became extinct from the earth 65 million years ago.

Since there were dinosaurs 100,000 years ago, it is possible that individual dinosaurs have survived to this day. This discovery gave great encouragement to those who believed that there were still dinosaurs on Earth.

However, there are also doubts about the existence of living dinosaurs in the world. They believe that similar dinosaurs are not necessarily dinosaurs, and that there may be many strange animals on Earth that are not well known to humans, and that it is not appropriate to classify them as dinosaurs based on just one or two similarities. It seems that the only way to solve this problem once and for all is to capture a live dinosaur for scientists to verify its authenticity.

How did the dinosaur become extinct and obscure?

Humans and dinosaurs can't coexist, because humans are the masters of the society now, dinosaurs are the masters of the society at that time, and a society can't have two dominants, and humans and dinosaurs are both strong, and neither can be dominated, and the demise of dinosaurs is the renewal of civilization, and humans are another civilization. Is it possible for two scholars and grandchildren to coexist?

The extinction of the dinosaurs was not necessarily related to the emergence of intelligent life, which was the result of a myriad of factors.

The dinosaurs weren't extinct yet. There are still a lot of dinosaurs in society.