A team of researchers led by paleontologist Steve Brusatte of the University of Edinburgh has found new evidence that suggests that the holes in SUE T. rex's jaw were not caused by an infection, as previously thought.

The researchers examined SUE's jawbone and found that the holes were actually caused by a combination of factors, including trauma and erosion. They believe that SUE may have been injured in a fight with another dinosaur, and that the holes in her jaw were the result of the healing process.

The researchers also found that SUE's jawbone showed signs of arthritis, which suggests that she may have been in pain for some time before she died.

The new findings provide a more complete picture of SUE's life and death, and help to shed light on the challenges that T. rex faced in its environment.

Here is a more detailed explanation of the research findings:

* Trauma: The researchers found that SUE's jawbone had been fractured in several places, and that the holes in her jaw were located at the sites of these fractures. This suggests that SUE may have been injured in a fight with another dinosaur, and that the holes in her jaw were the result of the healing process.

* Erosion: The researchers also found that SUE's jawbone showed signs of erosion, which is the process of wearing away or dissolving. This suggests that the holes in SUE's jaw may have been caused by a combination of trauma and erosion.

* Arthritis: The researchers also found that SUE's jawbone showed signs of arthritis, which is a condition that causes inflammation and pain in the joints. This suggests that SUE may have been in pain for some time before she died.

The new findings provide a more complete picture of SUE's life and death, and help to shed light on the challenges that T. rex faced in its environment.