It was another good week for physics as a team at the University of Chicago found gravitational waves provided a dose of reality about extra dimensions—they did not offer evidence of gravity “leaking” into additional dimensions. And a team with members from Imperial College London, the University of Oxford and Karlsruhe Institute of Technology found that just seven photons could act like billions, which suggested that scientists might study quantum behavior more easily than thought. Also, an international team reported on their discovery of a ‘tunable’ novel quantum state of matter that is more tunable than theory suggests. And another international collaboration resulted in the discovery of optimal magnetic fields for suppressing instabilities in tokamaks, marking another step toward harnessing fusion reactions.