Senescence is the process of aging in living organisms, characterized by a gradual decline in biological functions and an increased risk of age-related diseases. This phenomenon occurs at the cellular level, where cells lose their ability to divide and function properly over time. Factors such as genetic predisposition, environmental influences, and lifestyle choices can contribute to the rate of senescence. In humans, senescence is associated with visible signs of aging, such as wrinkles and gray hair, as well as a decrease in physical and cognitive abilities. Research into senescence aims to understand the underlying mechanisms and explore potential interventions to promote healthier aging and extend lifespan.