As a species, dinosaurs began to die much faster than it could occur a new species, said paleontologist Manabu Sakamoto of the University of Reading, England.
Dinosaurs were dying out long before they were destroyed by an asteroid impact on Earth 66 million years ago, according to a study by the University of Reading in England. It is the latest contribution to the great “debate” the scientists still can’t give a concrete answer whether dinosaurs died as a direct result of an asteroid impact.
There is a huge probability that dinosaurs already fought their survival on Earth, before finally hitting the big asteroid and completely destroy their own kind. But if and without the impact of the asteroid, dinosaurs would persisted today?
While some argue that the number of dinosaurs began to decline 5 to 10 million years before the final gap, new analysis suggests that it all happened much earlier, perhaps 50 million years before the catastrophic impact of the asteroid. As a species, “dinosaurs started to die much faster than it could occur a new species,” said paleontologist Manabu Sakamoto.
He led a team of British scientists to analyzed three large dinosaur family trees looking for evidence that the extinction happened more by the emergence of new species. They found that most groups of dinosaurs that “process” begun 50 million years before the asteroid impact.
Two overarching groups are reproduced and if it all together, the total time for extinction drops to 24 million years before finally disappearing from Earth. Among the groups that were rapidly dying out the two legged carnivores such as Tyrannosaurus Rex and a huge Sauropod. In contrast, the second known dinosaur, Triceraptos belonged to a group that is rapidly reproduced.
The results of this research are published in the journal of the British Academy of Sciences. Sakamoto noted that it is still not clear what caused the long-term decline in the number of dinosaurs. The results suggest that the impact of the asteroid just pushed that threatened group to final extinction, and only one group who were on the decline is still alive through its descendants, modern birds.
It is thought that the killer asteroid struck on the coast of today’s Mexican Yucatan peninsula, causing huge fires and prolonged dust and smoke that blocked out sunlight and changed climate. Most data analysis coming from North America, and some of them come from Asia and Western Europe.