Dan Salkeld, Stanford University (image) Stanford University Share Print E-Mail Caption Stanford University postdoc Dan Salkeld has been studying prairie dogs for years. Credit Dan Tripp Usage Restrictions Use of this photograph is for one-time use only by permission of the Woods Institute for the Environment at Stanford University. 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.