Foramen in Close Up (IMAGE) University of Adelaide Caption A hole in the femur of Centrosaurus apertus, a ceratopsian dinosaur. Credit Photo by Dr Donald Henderson, Curator of Dinosaurs, Royal Tyrrell Museum, Alberta, Canada. Usage Restrictions This image may be reproduced only with the appropriate credit. License Licensed 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.