A Bright Day for Dark Matter (IMAGE) American Physical Society Caption Dark matter could be the source for the enigmatic excess of gamma rays at the center of the Milky Way Credit Leane et al., Phys. Rev. Lett (2019) 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.