Dinosaurs are extinct, the reason may be it

Restoration map: Three main types of dinosaurs in the Lishan Basin Life at the end of the Baiji period. (Zhao Chuangi)

Ancient discovery 丨 66 million years ago dinosaurs extinct, the reason may be it ...

The mystery of the extinction of dinosaurs 66 million years ago has always been a hot issue that the world is concerned. The academic community has raised a variety of hypothesis, including the famous asteroid impact hypothesis. On the 20th, the reporter learned from the Chinese Academy of Sciences and the Institute of Ancient Human Research that the latest research of Chinese scientists on dinosaur eggs from the perspective of dinosaur diversity evolution reveals the new mechanism of dinosaur extinction. Related results have been published as a cover article recently in the International Journal of the Academy of Sciences.

As the main carrier of dinosaurs, the main carrier of dinosaurs on the earth can not only reflect the breeding habits of the dinosaur, but also the rich and buried laws in the strata can also reflect the ancient environment information of the dinosaur survival. The scientific research team composed of the Institute of Geology and Earth Physics of the Chinese Academy of Sciences, the Institute of Geoscopy of the Chinese Academy of Sciences, and the Chinese University of Geosciences (Wuhan), etc., carried out systematic paleontology and buried land in a rich land of dinosaur eggs in my country, Shaanxi Shanyang Basin Research on strata provides a new basis for answering the mystery of dinosaurs.

According to reports, the team collected more than 1,000 pieces of dinosaur eggs and eggshell specimens in origin. In addition, a small amount of tyrannosaurus and script bones were found here. The analysis of these dinosaur eggs and dinosaur bones shows that the dinosaur diversity in the Shanyang Basin has been at a lower level for about 2 million years before its extinction. Based on the dinosaur fossils found in other parts of my country, this study believes that the dinosaur diversity of my country's dinosaurs about 72 million years ago has significantly reduced the trend, which is similar to the characteristics of dinosaur fossil distribution in western North America.

The results of this study provided a new basis and perspective for the process and mechanism of understanding the extinction of dinosaurs. Dinosaurs belong to ovarian animals, and the success rate of dinosaur eggs directly determines whether the flourishing of the dinosaur population. The incubation of dinosaurs requires the appropriate temperature, humidity and even carbon dioxide concentration.

Therefore, this study proposed that in the late white world, with the synergistic evolution of the natural ecosystem and the dinosaur itself, the dinosaur diverse diverse decline has occurred, reducing the environmental adaptation ability of the dinosaur group, and resulting in the unable to be through the volcano. The survival and recovery of environmental changes caused by major disasters such as the outbreak or asteroid impact, which eventually moved towards extinction.

Source: Xinhua News Agency

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