How many years did dinosaurs rule the earth, and how many years did dinosaurs exist on earth

No, how do I remember that the dinosaurs ruled the earth for hundreds of millions of years? Dinosaurs were a group of animals that lived between 235 million and 65 million years ago and were able to walk upright with hind limbs supporting their bodies, and dominated the world's terrestrial ecosystems for more than 160 million years. Most of the dinosaurs have gone extinct, but the descendants of the dinosaurs, the birds, have survived and survived to this day.

30 million years.

Researchers have shown that dinosaurs evolved at the same time as protosaurs, and that during the first 30 million years of dinosaurs' existence, they occupied the same habitat. These conclusions imply that the primordial dragon is more likely to have gone extinct by accident than as a result of competing substitutions.

If my answer is useful to you, for: Thank you

Dinosaurs ruled three geological epochs for a total of 165 million years.

How many years did dinosaurs rule the earth?

Dinosaurs ruled the earth for hundreds of millions of years.

In the distant years when the Earth was just formed, there was basically no oxygen in the air, and the content of carbon dioxide was very high. Later, with the advent of autotrophs, photosynthesis began the process of consuming carbon dioxide and making oxygen, which changed the atmospheric environment on Earth.

There is evidence that the Mesozoic carbon dioxide concentrations of the dinosaurs lived were high, while the concentrations of carbon dioxide in the Cenozoic era that followed were low. The high content of carbon dioxide in the atmosphere during the Mesozoic era indicates that the dinosaurs were well adapted to the atmospheric environment with high carbon dioxide concentrations. Perhaps it is only in that atmosphere that they can live well.

At that time, although mammals had also appeared, they were never greatly developed, perhaps because the composition of the atmosphere and other environments were not very favorable to them, so they were in a weak position in the Mesozoic Era, and their development was slow.

Over time, by the end of the Cretaceous period, the atmospheric environment had changed dramatically, the content of carbon dioxide decreased, and the content of oxygen increased, and this unfavorable environment for dinosaurs may have caused discomfort to the dinosaurs' bodies, and in the new environment, dinosaurs were prone to diseases, and diseases would spread like plagues.

And the new atmospheric environment is more suitable for the survival of mammals, and mammals have become more advanced and adaptable competitors. Under the influence of these two factors, the dinosaurs eventually became extinct.

Dinosaurs ruled the earth for hundreds of millions of years. In 1841, the British scientist Richard. When Owen studied several fossilized bones that looked like lizards, he thought they were left over from some prehistoric animal and named them Dinosaurs, which means terrifying lizards.

The dinosaurs suddenly disappeared 65 million years ago at the end of the Cretaceous period.

Dinosaurs lived on Earth for about 100 million years and were a representative and iconic species of the Mesozoic Era.

Dinosaurs only appeared in the middle of the Triassic period, about 100 million years ago. After the Jurassic and Cretaceous periods of the Mesozoic Era, it did not become extinct until 65 million years ago. Lived together on Earth for 165 million years.

The Mesozoic Era began in the Triassic period about 100 million years ago and ended at the end of the Cretaceous period 65 million years ago. But in the early Triassic period of the Mesozoic Era, there were only primitive reptiles, and dinosaurs had not yet appeared.

The Earth has been born for 4.6 billion years, and in these 4.6 billion years, the Earth has experienced five mass extinctions, the most recent of which was the extinction of the dinosaurs 65 million years ago. Then it took countless more years for the birth of humanity.

It took about 3 million years for human beings to evolve from primitive life to intelligent life, which is too short for the evolution of a life, and it has to be said that human beings have created a miracle of life.

Dinosaurs were the overlords of the earth 65 million years ago, it relied on a huge and robust physique to stand at the top of the food chain, and dinosaurs lived on the earth for hundreds of millions of years, such a long time, did not dinosaurs evolve into intelligent life, did not develop into civilization? I'm afraid no one can do this question.