The week in physics: Neutrino mass; Hippies & Bell tests

The week in physics: 19–23 May We want to know more about how our readers interact with Physics Today content! If you're interested in being part of a focus group to help us better serve our readers, please fill out this form. ADVERTISEMENT Recruit the Next Generation STEM Workforce Leverage the employment versatility of talented physics bachelor recipients for roles in engineering, data science, programming, and more. Explore Career Expo options and learn more about why a physics hire could be the perfect fit for your organization at the 2025 Physics & Astronomy Congress.  Learn More Kinematic measurements are closing in on the neutrino mass The lightest massive particles are clear evidence of physics beyond the standard model. But the masses and their implications remain to be understood. Johanna L. Miller You might have missed Hippies, Bell tests, and a career studying quantum entanglement Investigating a group of maverick physicists who studied the foundations of quantum mechanics in the 1970s led one physicist-historian to help create a new test of entanglement. David Kaiser From the vault: March 1966 Space inversion, time reversal and particle‐antiparticle conjugation As we expand our observation, we extend our concepts. Thus the simple symmetries that once seemed self‐evident are no longer taken for granted. Out of studies of different kinds of interactions we are learning that symmetry in nature is some complex mixture of changing plus into minus, running time backward and turning things inside out. T. D. Lee ADVERTISEMENT Transform High School Physics Education Apply for the William F. and Edith R. Meggers Project Award to receive up to $25,000 to enhance high school physics education. This award supports high school–level projects aimed at increasing interest in physics and improving the quality of physics education. The deadline to apply is June 15.  Learn More From the May issue To make atomically thin metals, just squeeze Metals aren't naturally stable in 2D form. But when forced into thin sheets, they exhibit new and unusual properties that researchers are eager to explore Laura Fattaruso Post a Job Get Job Alerts Browse All Jobs Science Writer II Thorlabs, Inc (Rochester, NY) View Job PhD Scholarships in Quantum Technologies ARC Training Center for Current and Emergent Quantum Technologies (Australia) View Job Instructor to Teach Introductory Physics Duke University (Durham, NC) View Job Research Engineer (Physics Department) Pennsylvania State University (State College, PA) View Job Postdoctoral Scientist – Detector Integration and Characterization (f/m/d) European XFEL GmbH (Schenefeld, Germany) View Job Director of Undergraduate Laboratories in Physics at the University of Florida University of Florida (Gainesville, FL) View Job Physics Today is published by the American Institute of Physics. To manage your AIP email preferences and newsletter subscriptions, click here. Or unsubscribe from all AIP emails. © 2025 American Institute of Physics. Physics Today 1 Physics Ellipse College Park, MD 20740-3842 +1 301 209 3100