No bone could resist T. Rex's pulverizing bite, study says

Tyrannosaurus rex jaws generated 8,000-pound bite forces and let the creature eat everything from duck-billed dinosaurs to triceratops

Tyrannosaurus rex jaws generated 8,000-pound bite forces and let the creature eat everything from duck-billed dinosaurs to triceratops

Paleontologists have always speculated that the bite force of the Tyrannosaurus Rex exceeded by far that of other predators, its teeth being jokingly dubbed "killer bananas". When the huge carnivorous dinosaur took a bite, it did so with an awe-inspiring force equal to the weight of three small cars, enabling it to crunch bones easily.

The bone-crunching bite of Tyrannosaurus Rex was like no other, according to a study released Wednesday that solidifies the fabled carnivore's reputation as the most fearsome of dinosaurs. The Palo Alto, California-based company said the prototype contains 160 terabytes of memory, capable of managing the information from every book in the U.S. Library of Congress five times over.

Their computer modelling was developed and tested on alligators, with the researchers studying how each muscle contributed to the bite force. We show that bone pulverization was made possible through a combination of: (1) prodigious bite forces (8,526-34,522 newtons [N]) and tooth pressures (718-2,974 megapascals [MPa]) promoting crack propagation in bones, (2) tooth form and dental arcade configurations that concentrated shear stresses, and (3) repetitive, localized biting. They also calculated the amount of force the dinosaur's seven-inch (18-centimeter) conical teeth would exert on bones - an impressive 431,000 pounds per square inch (30,300 kilograms per square centimeter).

T. rex pulverized bones similar to how wolves and hyenas are able to do today, said a study by research teams from Florida State and Oklahoma State universities published this week in the journal Scientific Reports.

Crocodiles and T. Rex "are probably operating at tooth pressures that are nearing the extreme structural limits of what reptilian tooth enamel can handle", Gignac said.

"One thing I noticed [early on in my career] is that T.rex was pulverizing bone", Erickson told Gizmodo, recalling a giant triceratops pelvis that "looked like it had been chewed up by some sort of monster-some sort of giant dog".

In current day, well-known bone crunchers like spotted hyenas and gray wolves have occluding teeth that are used to finely fragment long bones for access to the marrow inside - a hallmark feature of mammalian osteophagy.

The T. rex's teeth inflict an even bigger damage.

The 3D model allowed scientists to estimate the bite forces at each tooth position along the jaw.

"We have modeled bite forces for giant fossil crocs at 23,000 pounds, so Tyrant King was not the king in that regard", Erickson says. But they saw that the biting force of the T. rex had not been determined with enough accuracy.

François Therrien, a paleoecologist at the Royal Tyrrell Museum in Canada, says over the years there's been plenty of attempts to estimate the bite force of T. rex. A tyrannosaurus tooth could generate 431,000 pounds per square inch.

"Having high bite force doesn't necessarily mean an animal can puncture hide or pulverize bone". "They carefully reconstructed many muscles and accounted for important aspects of muscle architecture and physiology".

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