Explore the fundamental differences between stable and radioactive isotopes and their diverse applications in this comprehensive 28-minute video. Learn about the principles of radioactive decay, radiometric dating techniques, and the significance of stable isotope ratios. Discover how isotopes are used to record climate changes, provide evidence for early life on Earth, and trace human carbon emissions. Delve into advanced concepts like mass-independent isotope fractionation and non-traditional isotope applications. Gain a deeper understanding of these essential tools in geoscience research and their role in unraveling Earth's history and current environmental challenges.