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Scientists studying a broken rib from Scotty, the largest known T. rex skeleton, used neutron and X-ray imaging to look inside the 66-million-year-old bone without damaging it. The scans revealed an extraordinary fossilized network of blood vessels that formed while the dinosaur's rib was healing, a level of soft-tissue detail rarely preserved in fossils. The discovery offers new insight into dinosaur physiology and healing processes, and demonstrates the potential of non-destructive imaging techniques for future paleontological research.