The life expectancy of an average human being in developed countries typically ranges from 80 to 85 years. Factors contributing to this longevity include better access to healthcare, advanced medical technologies, improved nutrition, and healthier lifestyles. In contrast, developing nations often face challenges such as inadequate healthcare, higher rates of infectious diseases, and malnutrition, leading to lower life expectancy. Differences in life expectancy highlight the importance of socioeconomic conditions and public health initiatives in fostering health and well-being across populations worldwide.