Abstract
The general impression is that the human lifespan is increasing. The lifespan is the biological limit to life; it is the maximum age obtainable by a member of a species. There is a statistical variance from this for individuals, but overall, lifespan is finite. What is really increasing is the life expectancy rather than the lifespan. An analysis of the average life expectancy indicates that death converges at a certain maximum age. Thus, the number of older people is increasing, but it will eventually reach a fixed limit. The time spent in old age will make up an increasing percentage of a typical life, as we have nearly eliminated premature death. The reason for this success is a virtual eradication of previously fatal infectious diseases.
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Schneider, H.P.G. (2000). General Aspects of Worldwide HRT Use. In: Kato, J., Minaguchi, H., Nishino, Y. (eds) Hormone Replacement Therapy and Osteoporosis. Ernst Schering Research Foundation Workshop, vol 4. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-04021-8_1
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DOI: https://doi.org/10.1007/978-3-662-04021-8_1
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