End of Dinosaurs: The new study strengthens the thesis that describes the eradication under the influence of the eclipse
The idea that dinosaurs are declining before the eradication of a eclipse can be eradicated for over 66 million years, explaining the fossil registration of fossil registration over the past 6 million years.
Chatgpt
The idea that dinosaurs are declining before the eradication of a eclipse can be explained by the fossil registration decline for the last 66 million years for over 66 million years.
A new study led by the University College London researchers published in current biology North American fossil registration for 18 million years before the influence of the eclipse at the end of the Cretaceous Period (66 and 84 million years ago).
If this is taken into account, The fossils (more than 8,000) indicate that the number of dinosaur species has reached a high of about 75 million years ago and decreased in nine million years before the australoid effect.
But the research team found that this trend was the reason for This period of time is less likely to be foundThere are fewer places with exposed and available rocks from the end of Cretassic.
The chief writer of the investigation, Chris Dean (UCL Earth Sciences), explained that his team analyzed the fossil record and found The quality of the four -group dinosaurs (clados) registration in the last 6 million years has deteriorated in the last 6 million years before the asteroid.
“The possibility of finding fossils of dinosaurs decreases, but at this time the likelihood of living in these areas is stable. It shows that we cannot accept fossil registration for its nominal value,” he said.
According to the expert, Half of this period of fossils was found in North America.
“Our investigations may at least have a better life than in the past before the impact of the dinosaurs in the dinosaurs in the area, perhaps with more varied species than we see in the gross rock record,” he said.
For the study, the investigating team dinosaur Yailosourida (armor like the tail of Clawa’s tail’s tail, Keratopside (large vegetarians with three horns, large vegetarians, treseratops), Hudroosourid .
They have adopted the technology that is previously used in environmental science and biodiversity studies to assess the likelihood of a race that lives in a particular area.
Deep research North America
They divided North America into a grid and at the time, based on geology, geographical and climate, how many dinosaurs in these grid cells occupy in four different moments in the last 18 million years of Cretassic.
Thus, they found it in this period, The ratio of the earth occupied by four clauds of dinosaurs is usually stableIts potential habitat indicates that the area is stable and the risk of extinction is low.
At the same time, they assessed Based on topics such as the amount of land available to researchers, the likelihood of identifying four types of dinosaurs in each area .
The team found it Reduced the likelihood of identifying in four periodsThe most effective item is revealed and affordable amount of corresponding rock.
Work ends it Dinosaurs are probably not inevitably condemned for extinct at the end of the messjayic.
If it is not for this eclipse, they can still share these planet with mammals, lizards and their remaining heirs: birds.
