Age-Related Bone Brittleness Chart (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption These graphs show the mechanical properties of human cortical bone as a function of age for (A) strength and (B) fracture-toughness. Credit Image courtesy of Ritchie, et. al Usage Restrictions None 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.