Evolution of Four-Legged Walking in Sauropods (image) Cell Press Share Print E-Mail Caption This graphical abstract shows how quadrupedal postures with flexed limbs potentially evolved several times in sauropodomorph dinosaurs. Credit McPhee et al. / Current Biology Usage Restrictions Credit required Share Print E-Mail 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.