The T. rex could pulverize bones with a force of 7800 pounds

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

Gregory Erickson, a paleobiologist from Florida State University, said: "T. rex could bite through whatever it wanted, as long as it was made of flesh and bone".

The scientists also describe how the remains of a triceratops bear 80 bite marks attributed to Tyrannosaurus rex, with part of a bone appearing to have been removed by repetitive, localised biting - and this feeding behaviour was also included into their model.

The Tyrannosaurus rex's bone-crushing capacity, known as "extreme osteophagy" is usually seen in carnivorous mammals such as wolves, but not in reptiles, whose teeth do not allow for chewing up bones.

To figure that out, the researchers generated a model of the T. rex bite relying on the fossil records and their data from analyzing crocodilian bites and using elements of crocodilian and bird (modern dinosaur) physiology.

"Predators with bone-crunching abilities are able to exploit a high-risk, high-reward resource: the minerals that make up bone itself and the fatty marrow that is contained inside", said palaeontologist Paul Gignac of the Oklahoma State University Centre for Health Sciences, lead author of the study published in the journal Scientific Reports.

"In this study, we show that Tyrannosaurus rex is the exception, and we sought to explain how this was possible", Gignac told Live Science in an email.

In a study newly published in the journal Scientific Reports, researchers report that T. rex was capable of biting down with nearly 8,000 pounds of force, with parts of certain teeth delivering a shocking 431,000 pounds per square inch of pressure.

In both cases, however, one thing is clear - the T. rex had a bite force that was stronger than any land animal in history. If a T. rex came across a carcass, it could still enjoy an easy meal.

For this research, the team, from Florida State University, build on previous models they had created to study how the musculature of living crocodilian species contribute to bite forces.

Previous studies have estimated Tyrannosaurus bite strength but the researchers in the new study called their approach more sophisticated.

How exactly the T. rex could break bones was unclear.

Researchers say the T. rex could bite with more than 3,600 kilograms of pressure, which is twice the force of the current living crocodile. Osteophagy is nearly unheard of in reptiles; their long, conical teeth don't tend to clamp together to deliver the crushing forces needed to shatter bone. In reality, some studies suggested that the T. rex might have been more of a scavenger, feasting mostly on dead prey as it was easier to obtain. The finding helps provide more evidence to the idea that the T. rex shattered bones and swallowed the fragments for sustenance.

Gignac said T. rex's powerful chompers allowed it to hold whole limbs in its mouth while the dinosaur gnawed. This close reading of its bone-destroying abilities shows that it had the bite to live up to the hype.



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