Comagnetometer Setup (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Dr. Teng Wu aligning the probe laser beam of the comagnetometer setup. Credit ©Arne Wickenbrock, JGU Usage Restrictions This image may only be used in connection with the press release "Tracking down dark matter", issued by Johannes Gutenberg University Mainz on July 2, 2019. 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.