Explore the intricacies of neutrino behavior in this second lecture on the Phenomenology of Neutrino Propagation, delivered by Andre De Gouvea at the International Centre for Theoretical Sciences. Delve into the fascinating world of these elusive particles as part of the "Understanding the Universe Through Neutrinos" program. Learn about neutrino oscillations, their unique properties, and their significance in particle physics beyond the Standard Model. Gain insights into the challenges of studying neutrinos and the specialized experiments designed to detect them. Discover the open questions in neutrino physics, including their nature as Majorana particles, the possibility of sterile neutrinos, mass ordering, and CP symmetry violation. Enhance your understanding of this vibrant field and its implications for our comprehension of the universe's fundamental interactions.