Maternal Group (image) Penn State Share Print E-Mail Caption These are Caribou cows and calves in West Greenland. Credit Jeff Kerby, Eric Post lab, Penn State University Usage Restrictions The image credit must be published along with the image. 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.