Adulthood is the stage of life that follows adolescence and typically begins in the late teens or early 20s, continuing until the end of one's life. This period is characterized by reaching physical and cognitive maturity, taking on greater responsibilities, establishing independence, and navigating various life transitions such as career development, relationships, and parenthood. Researchers in the field of adulthood study a wide range of topics, including age-related changes in physical and cognitive functioning, career development, family dynamics, social relationships, mental health, and well-being. They may also explore how experiences and events from earlier life stages influence adult development and outcomes. Ultimately, the study of adulthood aims to better understand the complexities of this stage of life and to identify factors that contribute to successful aging and overall well-being.