They have noticed that the death rate have been much decreased among women and young children, especially from infectious diseases. However, researchers have found that the life expectancy has been increased over the last few centuries. These things are likely to have more affected on the life expectancy of human beings. Life expectancy of human beings is likely to depend upon the certain behaviours of human beings such as smoking, alcohol, food, exercise and stress level. You may think that what is life expectancy or how is it calculated? In bookish language life expectancy is considered to be the statistical measure of the average time an organism is expected to live, based on the year of their birth, their current age and other demographic factors including sex while in the simple language we may term it as the expected number of years of life remaining at a particular age. Instead of bothering about certain questions we should consider about our life expectancy. Certain questions like "when I will die and how and at what age" or "how many years will I live" etc seem to bother us more. Birth, marriage and death are all in the hands of Almighty but we people like to live more in this world.
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