Researchers with Helicopter (IMAGE) University of Texas at Austin Caption The researchers used a helicopter to reach remote areas of Alaska for sampling. Lead author Michael O'Connor (left) and co-author Stephen Ferencz are pictured here in the midst of taking a permafrost soil sample. Credit Bayani Cardenas/The University of Texas at Austin. Usage Restrictions Include photo 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.