(IMAGE) Johannes Gutenberg Universitaet Mainz Caption The new result (red) confirms the recent results for the decay energy of 163Ho. The various symbols stand for different measurement techniques. Credit Ill./©: Max Planck Institute for Nuclear Physics Usage Restrictions This image may only be used in connection with the press release "Solving a long-standing atomic mass difference puzzle paves way to the neutrino mass" provided by Johannes Gutenberg University Mainz. 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.