Stable isotope analysis is a scientific technique used to investigate the origins, movements, and interactions of elements within biological, environmental, and geological systems. This method measures the ratios of stable isotopes (atoms of the same element with different numbers of neutrons) in samples, such as tissues, water, or minerals. These ratios can provide valuable information about an organism's diet, migration patterns, climate, and environmental conditions. Stable isotope analysis is commonly used in fields such as ecology, archaeology, geology, and forensics to study a wide range of phenomena and processes.