Must Have Flexible Ribs (video) University of Utah Share Print E-Mail Loading video... Caption A simulation showing how ribs might crowd together if they didn't rotate relative to the vertebrae when the spine bends during locomotion. Credit Cieri et. al., Sci Rep (2020) Usage Restrictions Non commercial with attribution 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.