Sloan Research Fellowship (IMAGE) University of Delaware Caption UD Professor Frank Schroeder has traveled to some of the most remote locations on the planet to set up radio antennas to detect cosmic rays, which are nature's highest-energy particles. At right, he is shown in Siberia with a research team from Germany and Russia prior to his UD career. Credit Photos courtesy of Frank Schroeder Usage Restrictions None 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.