Neutrinos are tiny, nearly massless particles that are produced in various nuclear reactions, such as those in the sun and during supernova explosions. For many years, scientists believed that neutrinos had no mass at all, but experiments have shown that they do possess a small amount of mass. This discovery has significant implications for our understanding of particle physics and the universe. The concept of neutrino mass challenges the Standard Model of particle physics, which initially did not account for it. Understanding how neutrinos acquire mass may help scientists uncover new physics beyond the Standard Model and provide insights into the fundamental forces that govern the universe.