Core (image) University of California - San Diego Share Print E-Mail Caption This is a photo of scientists on a 2003 deep sea expedition looking at a sediment core containing a record of a 65.5 million year old asteroid impact. Scripps paleoceanographer Richard Norris is third from left. Credit Scripps Institution of Oceanography, UC San Diego Usage Restrictions None 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.