Image from Virtual 3D Reconstruction (IMAGE) University of Washington Caption This image from the virtual reconstruction shows how the ribs attach to the spine in an inward direction, forcing an even more upright posture than in modern humans. Credit Gomez-Olivencia, 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.