Sixty-six million years after a great predator suffered a broken rib and began to heal, the biological memory of that moment — blood vessels, iron, and all — has survived to be read by human instruments. Scientists at Oak Ridge National Laboratory used neutron imaging to peer non-invasively into a fossilized rib from Scotty, the world's largest known T. rex, uncovering a rare preserved vascular network that formed during the dinosaur's final, incomplete recovery. The discovery reminds us that the fossil record is not merely a catalog of bones, but an archive of lived experience — injury, resil