Dinosaurs receded before the asteroid fatal blow wiped them out


Ecological factors had already begun to reinforce their own opposition to Cretaceous creatures, long before the species’ ultimate betrayal due to their fateful asteroid explosion, the researchers said.

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Paleontologists have escaped the devastating end of the asteroid’s death explosion for decades, and the 160 million years of reign of the world’s most terrifying creatures continue uninterrupted on planets where ecology has already begun to change. I have argued that it could have continued. Turn your back on them. In a study published Tuesday, scientists claim the fate of the dinosaurs may have been sealed long before space rock tore a 115-mile-wide crater on the Yucatan Peninsula.

New studies show how cool climates and the decline of herbivores created domino effects The ecosystem for cretaceous creatures changed.. This study, published in the journal Nature Communications, was produced by an international team of scientists, including researchers from the University of Bristol in the UK and the Montpellier Institute of Science in France.

“We saw the six most often Dinosaur family in the Cretaceous Period, 150 to 66 million years ago, all of which evolved, expanded and clearly proven successful, ”said Fabien Condamine, researcher at CNRS, lead author of the study. Said in the press release on Tuesday.

“Then, 76 million years ago, they showed a sudden decline. Their extinction rate increased and in some cases the emergence rate of new species decreased. “

The graphs in this study show how species formation rates (blue) have declined, just as extinction rates (red) have skyrocketed over the last 10 million years of dinosaur rule. Scientists say this combined corresponds to the rapid decline in species numbers just before the asteroid impact 66 million years ago.

Bristol University / Fabian L. Condamine

A vortex of variables that previously obscured the search for dinosaurs before they collided with asteroids, such as incomplete fossil records, uncertainties in fossil dating, and doubts about evolutionary models. As a result, the team used over 1,600 dinosaur records to run each model a million times to determine the cause of all possible failures. And finally, see if the analysis converges and suggests the most likely answer.

“This means the data is constantly improving,” said Phil Curry, co-author of the University of Edmonton. “The decline in dinosaurs over the past 10 million years makes sense, and this is certainly the best-studied part of their fossil record, as our study shows.”

In the end, dinosaur data showed some of the leading causes of species decline, according to Mike Benton, co-author of the University of Bristol.

“It became clear that there were two main factors. One of them is that the climate is cool overall, which makes the life of the dinosaurs, who are likely to depend on warm temperatures. It has become difficult, ”says Benton.

“The subsequent loss of herbivores left the ecosystem unstable and vulnerable, and reflected the failure of long-lived dinosaur species to adapt to the planet’s new conditions. And I found it was easy to die out. “

Meanwhile, scientists have said that the actions of mammals who dug tiny holes in the undergrowth (the ultimate heirs to the post-apocalyptic planet we know today) likely went unnoticed by giant dinosaurs. ..

Like 66 million years ago, the Cretaceous giant didn’t seem to notice anything until the little fireballs in the sky were big and hot and the dinosaurs were submerged in one final explosion. You were too late to notice anything again.

Dinosaurs receded before the asteroid fatal blow wiped them out Dinosaurs receded before the asteroid fatal blow wiped them out


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