Life expectancy is the average number of years a person is expected to live. It varies by geographical area and by era. For example, in the Bronze Age, life expectancy was 26 years. In 2010, the world population's average life expectancy was 67 years. How do you calculate life expectancy? Life expectancy calculation is based on adjusting the remaining life expectancy directly rather than on mortality rates at each age. These factors are determined by differences in life expectancies at birth. Th

88K views · 494 reactions | Countries with the Highest Life Expectancy at Birth, and countries with the lowest life expectancy at birth. Source: United Nations, Department of Economic and Social Affairs. | VGraphs | Facebook