Physicists have achieved a milestone by registering the resonant interaction of an electron antineutrino with an electron via a W-boson, known as the Glashow resonance, using the IceCube neutrino telescope in Antarctica. This event, with energy measured at 6.05 ± 0.72 PeV, matches theoretical predictions and provides new insights into high-energy astrophysical processes that are otherwise inaccessible to Earth-based accelerators. The discovery helps narrow down models of cosmic particle sources and demonstrates the power of machine learning in modern astrophysics.