Explore the fascinating world of neutrinoless double beta decay in this comprehensive lecture by Michelle Dolinski. Delve into the fundamental concepts and latest research surrounding this rare nuclear process, which could provide crucial insights into the nature of neutrinos. Learn about the theoretical foundations, experimental techniques, and potential implications for particle physics and cosmology. Gain a deeper understanding of how neutrinoless double beta decay experiments contribute to our quest to determine whether neutrinos are their own antiparticles (Majorana particles) and shed light on the absolute neutrino mass scale. Discover the challenges and advancements in detecting this elusive phenomenon, and explore its significance in addressing key questions in neutrino physics and beyond the Standard Model of particle physics.