A Studentworking (IMAGE) University of Wisconsin-Madison Caption Colin Adams, a UW-Madison physics undergraduate, makes an adjustment to a novel prototype camera that will be used to image the fleeting signatures of gamma rays crashing into molecules of air in the Earth's atmosphere, creating a shower of diagnostic secondary particles. Credit Savannah Guthrie 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.