Persistence refers to the ability of a substance or phenomenon to remain stable or unchanged over time. In the context of research, persistence often refers to the longevity or durability of certain traits, conditions, or patterns. Researchers may investigate factors that contribute to persistence, such as environmental or genetic influences, and seek to understand how persistence can impact various aspects of life, society, or the natural world. This research area may encompass studies on persistence of behaviors, diseases, environmental contaminants, social norms, and other phenomena.