Landsat Image Pair (image) US Geological Survey Share Print E-Mail Caption Image pair reveals pine beetle assault on Utah forest. Dark green healthy forest in 1992 (left) is dark red in 2010 (right). Credit USGS 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.