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Using geochemical analysis of the bones and rock, a team of researchers with the University of Arkansas determined that the dinosaurs died and were buried in the same place and were not the result of fossils washing in from multiple areas
Ferocious tyrannosaur dinosaurs may not have been solitary predators as long envisioned, but more like social carnivores such as wolves, as per a recent study unveiled.
Paleontologists developed the theory while studying a mass tyrannosaur death site found seven years ago in the Grand Staircase-Escalante National Monument in southern Utah, one of two monuments that the Biden administration is considering restoring to their full size after former President Donald Trump shrunk them.
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A whole lot of Tyrannosaurus rexes used to rule the planet.
Seth Borenstein
One Tyrannosaurus rex seems scary enough. Now picture 2.5 billion of them. That’s how many of the fierce dinosaur king probably roamed Earth over the course of a couple million years, a new study finds.
Using calculations based on body size, sexual maturity and the creatures’ energy needs, a team at the University of California, Berkeley figured out just how many T. rex lived over 127,000 generations, according to a study in Thursday’s journal Science. It’s a first-of-its-kind number, but just an estimate with a margin of error that is the size of a T. rex.
《科學》雜誌刊新研究 估計北美曾有25億隻暴龍 sina.com.tw - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sina.com.tw Daily Mail and Mail on Sunday newspapers.
Tyrannosaur Teens Didn’t Have the Bone-Crushing Bite of Adults
Image: Mary Altaffer (AP)
Adult tyrannosaurs were basically bone crushing machines on two feet. New research suggests juvenile tyrannosaurs couldn’t match the same level of brutality, resulting in a distinctive bite that set them apart from their adult counterparts.
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Nothing like tyrannosaurs exist today, and thank goodness for that. As the quintessential apex predator of the Mesozoic, these megatheropods featured bite forces that boggle the imagination. The modern lion exerts a respectable 1,300 Newtons of force when chomping down on prey , but
T. rex with its wide and deeply set jaw exerted a whopping 60,000 Newtons of force with each horrific bite.