The human lifespan refers to the length of time a person lives, typically measured from birth to death. On average, people live around 70 to 80 years, although this can vary based on factors like genetics, lifestyle, and healthcare access. Advances in medicine and technology have contributed to increased life expectancy over the years. Factors influencing lifespan include diet, exercise, and environment. For instance, individuals who maintain a balanced diet and engage in regular physical activity often enjoy longer, healthier lives. Additionally, social connections and mental well-being play significant roles in overall longevity.