Dinosaur shin bone (IMAGE) Adelphi University Caption In the broken dinosaur shin bone, the bone fractured along annual growth rings, which are very closely spaced. This animal grew slowly for many years. Credit Michael D'Emic Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.