17. **Recent Developments in Radioactive Decay Research** - Mention any recent advancements or discoveries in the field?

One recent development in radioactive decay research is the discovery of a new type of radioactive decay called two-neutrino double electron capture. This process involves the simultaneous capture of two electrons and the emission of two neutrinos, resulting in the transformation of a nucleus into a different element. This discovery has expanded our understanding of nuclear decay processes and has implications for nuclear physics and astrophysics. Additionally, researchers have been studying the possibility of using radioactive decay as a potential energy source for long-duration space missions, which could have significant implications for future space exploration.