T. rex Evolution: Asia, North America

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famed Tyrannosaurus rex

Live Science

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Science

Scientists edge closer to solving mystery of T. rex origins

Summary

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80% Informative

New study suggests T. rex's direct ancestors arose in Asia and migrated to North America .

The location of where the Tyrannosaurus rex originated has long been a hot topic for paleontologists.

The researchers used a model based on where and when tyrannosaurid species had been discovered, their evolutionary trees, and local climate.

Study shows how the climate affected even the largest and most dominant dinosaurs.

"It seems like tyrannosaurs were able to get big multiple times independently, when cooler climates promoted increases in size," study co-author Brusatte says.

"The kings of the dinosaurs were not predestined to rule, but were helped along by the climate," he says.

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