Second extinction t rex location4/10/2023 ![]() ![]() The predator acquired its food through scavenging and hunting, grew incredibly fast and ate hundreds of pounds at a time, said University of Kansas paleontologist David Burnham. rex was a huge carnivore and primarily ate herbivorous dinosaurs, including Edmontosaurus and Triceratops. rex were more lightly built and faster than the much larger, lumbering, bone-crushing adults they would grow into. The finding, on a newfound mid-Cretaceous tyrannosaur named Timurlengia euotica, suggests that the advanced brains tyrannosaurs developed while they were still small helped them become apex predators once they grew to T. ![]() Though lacking in stature, these little tyrannosaurs had advanced brains and advanced sensory perceptions, including hearing, a 2016 study detailed in the journal Proceedings of the National Academy of Sciences revealed. The first tyrannosaurs, which were human- to horse-size, originated about 170 million years ago during the mid-Jurassic. rex may be big, but its predecessors were small. rex's teeth were wide and somewhat dull (rather than being flat and daggerlike), allowing the teeth to withstand the forces exerted by struggling prey, the study found. Specifically, the dinosaur's front teeth gripped and pulled its side teeth tore flesh, and its back teeth diced chunks of meat and forced food into the throat. ![]() But not all of the dinosaur's teeth served the same function, according to a 2012 study in the Canadian Journal of Earth Sciences. rex had a mouth full of serrated teeth the largest tooth of any carnivorous dinosaur ever found was 12 inches (30 centimeters) long. (Image credit: © Scott Hartman / All rights reserved) Artwork by Scott Hartman reveals the bone structure of T. ![]()
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