tl;dr: New lattice QCD calculations from the BMW group and others now match Fermilab's measured muon g-2 wobble, seemingly resolving a 25-year anomaly that had hinted at new physics. However, this contradicts older "data-driven" predictions based on electron-positron collision experiments, and a 2023 measurement at Siberia's VEPP-2000 collider found a significantly different pion production rate than prior experiments. Physicists are now scrutinizing decades of collider data to determine whether the discrepancy reflects unknown particles or overlooked experimental effects.