Petrel Bones (image) Michigan State University Caption Excavated bones of Hawaiian petrels -- birds that spend the majority of their lives foraging the Pacific -- show substantial change in the birds' eating habits. Credit Courtesy of Brittany Hance, Imaging Lab, Smithsonian Institution. Usage Restrictions None 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.