Explore the origins of high-energy neutrinos in this 44-minute conference talk by Ali Kheirandish from Penn State, presented at the Interdisciplinary Developments in Neutrino Physics Conference. Delve into cutting-edge research on neutrino physics, including their astrophysical sources, connections to gravitational waves, and implications for cosmology. Gain insights into the latest experimental data, high-precision neutrino cross sections, and the role of neutrino detectors as astrophysical observatories. Discover how this interdisciplinary field is advancing our understanding of the universe through the study of these elusive particles.