Walton -- Mummy Argonne Experiment 2 (IMAGE) Northwestern University Caption Northwestern University scientists performed an X-ray scattering experiment Nov. 27 at Argonne National Laboratory on a 1,900-year-old portrait mummy -- the first study of its kind. Credit Photo credit Jim Prisching Usage Restrictions Credit must be given 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.