Andriuzzi, Colorado State University (image) Colorado State University Share Print E-Mail Caption Walter Andriuzzi takes a soil sample in the McMurdo Dry Valleys in December 2016. He steps on rocks to avoid disturbing the ground. Credit Ross A. Virginia, Dartmouth College 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.