Ralph Mitchell, Harvard University (image) Harvard University Share Print E-Mail Caption Ralph Mitchell in his lab at the Harvard School of Engineering and Applied Sciences. Mitchell, an expert in cultural heritage microbiology, believes that a "fingerprint" left by ancient Egyptian microbes may reveal a new secret about King Tut's burial. Credit Eliza Grinnell, Harvard School of Engineering and Applied Sciences. 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.