T. rex ancestors crossed from Asia to North America via land bridge 70 million years ago, study finds
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Direct Tyrannosaurus Rex He could have arrived in North America after crossing the Earth bridge from Asia, according to a new study. This report is the latest that weighs intense discussions between excavation scholars about the origins of the king of dinosaurs.
A team led by Casius Morrison, a PhD student at College University in London, or the University of California in Los Angeles, used mathematical modeling for the conclusion that the T. Rex has probably arrived in North America after the BERING Strait crossed the contemporary Siberia and Alaska about 70 million years ago.
It follows the discovery with Past research This indicates that T The best predators in North America Like Daspletosaurus, Morrison said in a statement.
At that time, the region was home to moderate rainforests, with a climate that somewhat similar to British Columbia today.
Morrison said that the ancestors of T. Rex – Tyrannosaurids – could have been fewer in their environment compared to the herbes dinosaur they did, such as the predators in Apix like lions today.
“Because they are less, there are also less chances for them to keep the fossil record,” he said.
Morrison said that Morrison was confronting through this deficiency in evidence, and instead used sports models that include data from the current fossil record and the T. Rex family tree, as well as climatic and environmental conditions.
He added that modeling also explains the gaps in the fossil registry, which means that it can be updated if new discoveries are made in future research. For example, Morrison said that the results of the new study indicate that the fossils of the ancestors of T. Rex may still be discovered in Asia.
Why did T. Rex evolve into a giant
The team also found that Tyrannosaurids, such as T
The rapid growth came in size after another group of giant dinosaurs that eat meat known as Carcharodontosaurids It became extinct, leaving a vacuum at the top of the food chain, “according to a press statement issued by the University of California on Tuesday.
This growth means that by the time the dinosaurs became extinct, T
“The results have shed light on the extent of the largest Tiranusturter in North and South America during the Cretaceous (period) and why they grew up by the end of the era in the era,” Charlie Shearer, who is studying, a master’s degree in Earth Sciences and a doctoral student soon at the University of California at the University of California in a statement.
“They may have grown into giant sizes to replace the giant caroserodontosuride on an equal footing that became extinct about 90 million years ago,” Shearer said.
“This extinction is likely to remove the environmental barrier that prevented Tyrannosaurs from growing to these sizes.”
Steve Bruce, a fossil scientist at Edinburgh University in Scotland, who did not participate in the study, told the CNN that “the paper” is a good scientific work that follows the airline and other dinosaurs that eat meat over time, and its development with climate changes is compared.
He said: “Even the largest and most dominant dinosaurs on the weather.
“It was easier to be large when the temperatures were cold. The dinosaurs kings were not estimated to rule, but he was assisted in the climate,” Bruce added.
The study was published in the magazine The royal society is open science.
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