Drilling clam shell (IMAGE) Louisiana State University Caption LSU Ph.D. candidate Jacob Warner drilled along the clam's shell to collect samples at each interval of time during the clam’s lifespan to get a snapshot of the ocean temperature as the shell grew. Credit Jacob Warner, LSU Usage Restrictions NA License Original 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.