Alligator and Chicken Development (IMAGE) Imperial College London Caption These are the developing skulls of an alligator (top) and a chicken (bottom). Credit Fabbri et al., 2017 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.