Warming Cones (image) Penn State Caption This image of some of the warming cones used during this experiment was taken by Eric Post during his research expedition in Greenland. Credit Eric Post, Penn State University Usage Restrictions The image credit must be published along with the image. 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.