Forams (image) University of California - San Diego Share Print E-Mail Caption The sizes of deep sea foraminifera fossils from just after the impact (a) and immediately before the impact. The scale bar in both pictures is 500 microns (half a millimeter). 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.