Showers of Particles from Cosmic Rays (IMAGE) University of Chicago Caption This is an artist's rendering of a cosmic-ray air shower with a water-Cherenkov detector of the Pierre Auger Observatory in western Argentina. Credit A. Chantelauze, S. Staffi, L. Bret Usage Restrictions With credit 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.