Landmark Study: Dinosaurs Were in Their Prime When Asteroid Hit Earth

 A landmark study reveals that dinosaurs ruled the planet up until 66 million years ago, when a deadly asteroid struck Earth, causing their mass extinction.




The findings, which were published on December 7 in the journal Science Advances, are the most conclusive proof yet that dinosaurs were exterminated during their prime. Dinosaurs were not in decline when the C H-I C X U L U B asteroid struck.


The study, led by an international team of paleontologists and ecologists, analyzed 1,600 fossil records from North America. While mammals and other species, such as turtles and crocodiles, survived, scientists have long debated why non-bird dinosaurs like Triceratops and Tyrannosaurus rex went extinct. Scientists displayed the established pecking orders and natural territories of land-living and freshwater creatures during the last a few million years of the Cretaceous, and the initial not many million years of the Paleogene time frame, after the space rock hit.


Paleontologists have known for some time that many small mammals coexisted with dinosaurs. However, as the Cretaceous period progressed, this study reveals that these mammals were diversifying their diets, adjusting to their environments, and becoming more important ecosystem components. In the meantime, the dinosaurs were dug in stable specialties to which they were especially very much adjusted.


According to experts, mammals didn't just take advantage of the dying dinosaurs. By occupying new ecological niches, evolving more diverse diets and behaviors, and quickly adapting to small climate shifts, they were generating their own advantages through diversification. They were better equipped than the dinosaurs to deal with the asteroid's radical and abrupt destruction, so these behaviors probably helped them survive


Jorge G-A R C-A G-I R O N, the first author, is from the Department of Biodiversity and Environmental Management at the University of León in Spain and the Geography Research Unit at the University of O U L U in Finland.


The ecological structure, food webs, and niches of the first mammal-dominated ecosystems following the asteroid's impact and the last ecosystems dominated by dinosaurs in the Cretaceous period are vividly depicted in our research. This helps us unravel one of paleontology's long-standing mysteries: why the dinosaurs that weren't birds perished, but mammals and birds survived?


A-L F-I O Alessandro C H-I A-R E-N Z-A, co-lead author, from the Department of Ecology and Animal Biology at the University of Vigo in Spain, stated: In the wake of the asteroid impact, which abruptly altered the ecological rules of the time, it appears that the stable ecology of the last dinosaur actually hindered their survival.


On the other hand, some animals—birds, mammals, crocodiles, and turtles—had previously developed better adaptations to environments that fluctuated rapidly and were unstable, which may have helped them survive when the asteroid struck.


Senior author, Personal Chair of Paleontology and Evolution, School of Geosciences, University of Edinburgh, Professor Steve B R U S-A T-E, stated: Up until the asteroid exploded, dinosaurs continued to thrive in stable ecosystems. 


In the interim, well evolved creatures were enhancing their eating regimens, ecologist, and ways of behaving while dinosaurs were as yet alive. Therefore, it wasn't just that mammals profited from the extinction of dinosaurs; rather, they also created their own advantages, which ecologically predated them to survive the extinction and fill in the gaps left by the dinosaurs' demise

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