Multiple scales, also known as multi-scale analysis, is a research area that focuses on studying phenomena that occur at various scales simultaneously. This approach recognizes that many systems and processes in nature exhibit behavior that cannot be fully understood by examining only one scale, and that interactions between different scales are important for a comprehensive understanding. Researchers in multiple scales often use a combination of different methodologies and tools to study phenomena at various levels of organization, such as spatial scales (microscopic, macroscopic), temporal scales (seconds, years), or organizational scales (molecular, cellular, organismal, ecological). By integrating information from different scales, researchers gain a more complete understanding of complex systems and their emergent properties. Applications of multiple scales research can be found in fields such as biology, physics, engineering, environmental science, and social sciences. This approach is particularly valuable for addressing interdisciplinary research questions and understanding the behavior of complex systems that involve interactions across multiple scales.