Fossil Analysis Reveals Tyrannosaur Cannibalism Through 3D Scanned Bite Marks
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A detailed 3D scan of a fossilized tyrannosaur foot bone has revealed 16 distinct bite marks from a smaller tyrannosaur, providing direct evidence of cannibalism among these predators. The study, led by a Master's student using digital and 3D-printed models, found the bites were on a meat-poor part of the foot and showed no signs of healing. The fossil, discovered in Montana, is now housed in a museum in North Dakota.
Facts First
- 3D scanning revealed 16 bite marks on a 75-million-year-old tyrannosaur foot bone.
- The marks were made by a smaller tyrannosaur, indicating cannibalistic behavior.
- The bone shows no signs of healing, suggesting the bites occurred after death.
- The fossil was studied using digital and 3D-printed models created at Aarhus University.
- The original fossil, discovered in Montana, has been donated to the Badlands Dinosaur Museum in North Dakota.
What Happened
A Master's student in geoscience, Josephine Nielsen, led a study analyzing a fossilized metatarsal (foot bone) from a large tyrannosaur. Using 3D scanning techniques, she examined a digital model and a 3D-printed version of the 10-centimeter-long fossil, which originated from the Judith River Formation in Montana. The analysis uncovered 16 distinct bite marks on the bone, which were identified as precise impressions from the teeth of a smaller tyrannosaur. The bite marks are located on the foot, an area with very little meat, and the bone shows no signs of healing at the bite sites.
Why this Matters to You
This discovery provides a tangible, detailed look into the behavior of dinosaurs that lived over 75 million years ago. It demonstrates how modern technology, like 3D scanning and printing, can unlock new information from ancient fossils without risking damage to the originals. The study also highlights how contributions from amateur collectors and international collaboration between students and experts can lead to significant scientific findings.
What's Next
The fossil has been donated to the Badlands Dinosaur Museum in Dickinson, North Dakota, where it may be available for public viewing. The detailed classification of the bite marks using a systematic method could provide a template for analyzing other fossils for similar evidence. Further study of the fossil collection from the Judith River Formation might reveal more about the ecosystem and interactions between tyrannosaurs.