Tyrannosaurus rex likely inflicted some bite marks on Cretaceous-era fossil bones
Fossilized dinosaur bones discovered in Wyoming bear tooth marks that suggest Tyrannosaurus rex was responsible for some of the injuries. This finding is detailed in a study published on July 15, 2026, in the scientific journal PLOS One. The research was conducted by Bethania C. T. Siviero, affiliated with Loma Linda University in the United States, and her team of colleagues. The study specifically examines the fossilized remains, identifying distinct bite marks that align with the known characteristics of T. rex dentition. These marks offer direct evidence of predatory or scavenging behavior by this iconic dinosaur species during the Cretaceous period. The location of the fossils in Wyoming places them within a known habitat range for Tyrannosaurus rex during that era. The publication in PLOS One signifies that the findings have undergone peer review and are considered a credible contribution to paleontological research. This evidence adds to our understanding of the ecological interactions and feeding habits of dinosaurs in prehistoric North America.
This paleontological discovery provides tangible evidence of Tyrannosaurus rex's predatory or scavenging role within its ancient ecosystem. By analyzing specific tooth marks on fossilized bones, researchers can reconstruct feeding behaviors and interspecies dynamics. Such findings contribute to a more nuanced understanding of the Cretaceous food web, moving beyond general assumptions about apex predators. Future research may explore the prevalence of such marks across different fossil sites and species to further quantify T. rex's impact on its environment, offering insights into the selective pressures that shaped dinosaur evolution.
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