Sampling Sites (IMAGE) University of Washington Caption On the road trip in early 2013, researchers collected hundreds of samples of undisturbed snow from 67 sites away from cities or major roads. Credit S. Doherty / Univ. of Washington Usage Restrictions With credit 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.