Dinosaurs, a species that once lived on the earth for nearly 200 million years, had a large and robust body, but they suddenly disappeared from the earth, leaving only a fossil, which is a big mystery in the history of biology, so far scientists have not had an exact statement about the extinction of dinosaurs, so when did the dinosaurs become extinct?
1. The discovery of dinosaurs
Dinosaur fossils were discovered a long, long time ago, but they never knew what they were, and they called them giant fossils until nearly 200 years ago, when scientist Mantel and his wife thought that the tooth fossils they found were not rhinoceros or crocodiles, but an animal similar to iguanas, and later named them avians.
This discovery inspired scientists from all walks of life to study dinosaurs, while studying the habits and types of dinosaurs, a greater mystery emerged in the hearts of human beings, people began to continue to study the cause and time of their extinction according to their fossils and the state of the surface layer, more than 100 years have passed, with the fossil specimens of dinosaurs unearthed one by one, the veil of dinosaurs in people's hearts gradually dissipated.
2. The third century of dinosaurs
Dinosaurs lived for nearly 200 million years in three centuries: the Triassic, Jurassic, and Cretaceous. Among them, the Triassic and Jurassic have existed for about 50 million years, and the Cretaceous has existed for 70 million years. During the Jurassic period, the number of dinosaur species doubled, they became the masters of the world, it was the heyday of dinosaurs, and during the Cretaceous period, the species of dinosaurs reached their peak, and higher mammals began to appear.
3. The disappearance of dinosaurs
According to scientists' research and research, almost 65 million years ago, at the end of the Cretaceous period, this diverse family of dinosaurs disappeared from the earth, leaving only fossils to prove that they had been there, and an era was officially declared. Due to the extremely short period of extinction of dinosaurs, scientists speculate that it may have been caused by meteorite impacts, and it is said that the largest crater in the world may have caused the extinction of dinosaurs.
This is also a speculation that is generally accepted by scientists, in addition to the acid rain theory, the evolution of species, climate change theory, food poisoning theory and other conjectures. But because of the long term, the real reason for the extinction of the dinosaurs is also drowned in the dust of history, just like their bodies.