The week in physics: Earth’s magnetic dipole; Rallying for science; Quantum workforce

The week in physics: 10–14 March ADVERTISEMENT Mad City Labs - Visit us at APS March Meeting, Booth #401 Tools for the Nanoscale. Nanopositioners, Micropositioners, RM21® Single Molecule Microscopes, MadAFM®, Resonant Probe AFM/NSOM. New! DIY Quantum Scanning Microscope, UHV positioners. Our products are widely used in biophysics, condensed matter physics, metrology, material characterization, and quantum sensing. Earth's magnetic dipole collapses, and life explodes The present-day magnetic field protects life, but an ancient phase when it nearly collapsed corresponded with a key step in evolution. Changes in the planet's deep interior may have started it all. John A. Tarduno Rallying for science across the US Crowds gathered on the National Mall in Washington, DC, and in cities across the US on 7 March to protest the Trump administration's actions undercutting US science. Jenessa Duncombe From the vault: July 1982 CP symmetry violation In an informal discussion that grew out of a recent talk to physics teachers in Chicago, the codiscoverer of CP asymmetry recalls the circumstances of the observation and discusses its implications. James W. Cronin and Margaret Stautberg Greenwood Ukrainian physics journal celebrates a half century The editors of Fizyka Nyzkykh Temperatur (Low Temperature Physics) have continued publishing despite Ukraine's war with Russia. Toni Feder Not all quantum jobs require quantum skills To go commercial, quantum science needs a sizable workforce. Jenessa Duncombe Nanoscale 3D printing Focused electron beam–induced deposition is a 3D nanoprinting technique capable of producing intricate metal-based nanostructures with exceptional design flexibility. Richard J. Fitzgerald From the March issue Japan accelerator pursues nanobeams to boost luminosity Squeezing beams of electrons and positrons for the Belle II experiment at the SuperKEKB facility proceeds with halting progress. Toni Feder Post a Job Get Job Alerts Browse All Jobs Senior Science Writer Thorlabs, Inc. (Newton, NJ) View Job Post-Doctoral Positions Indiana University Physics Department (Bloomington, IN) View Job Director of Physics Research Labs American University (Washington, DC) View Job Tenure-Track Positions in Quantum Optics, Superconducting Quantum Circuits, and Quantum Materials Norfolk State University (Norfolk, VA) View Job Inertial Confinement Fusion Physicist Lawrence Livermore National Laboratory (Livermore, CA) View Job Physics Teaching Jobs at K-12 Private Schools ATOMS Placement Services (Nationwide) 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