<p><span style="color: rgb(0, 0, 0);">The muon has been a source of interesting physical phenomena ever since its discovery which prompted Nobel Laureate Isadore Rabi to exclaim, ``Who ordered that?'' The anomalous magnetic moments (g-2) of (first) the electron and (now) the muon have provided evidence of the spectacular success of quantum field theory. However, for over twenty years there had been about a three standard deviation tension between the experimental measurement of the muon g-2 and the Standard Model calculation of its value. In April, 2021, E989 the Fermilab g-2 experiment announced its initial result. This resulted in a 4.2 standard deviation between theory and experiment, not quite the 5 standard deviation difference to declare evidence for new physics beyond the Standard Model. We will discuss the plot twists in theory and experiment that happened since then.</span></p>

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20-kton liquid-scintillator detector in southern China designed as a multi-purpose neutrino observatory with an anticipated 30-year scientific program. Located 52.5 km from the Yangjiang and Taishan reactor complexes, its primary objective is to determine the neutrino mass ordering while delivering precision measurements of neutrino oscillation parameters. Construction of the central detector was completed in December 2024, followed by liquid-scintillator filling and commissioning in 2025, and physics data taking began on 26 August 2025. Using its first data set, JUNO has reported world-leading measurements of the solar oscillation parameters sin²θ₁₂ and Δm²₂₁, demonstrating high-precision reactor antineutrino measurements and establishing the experimental foundation for future mass-ordering sensitivity. Beyond reactor oscillation studies, JUNO’s physics program includes solar, atmospheric, geo- and supernova neutrinos, as well as searches for rare processes. In this seminar, I will present the detector status, the first oscillation results and their implications, and outline the prospects for other physics programmes.

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