Forams (IMAGE) University of California - San Diego 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 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.