Three score and ten.

Abstract

Excluding infant and child mortality, the average "natural" life span seems to be about 70 years. It has remained so for several thousand years. It shows little sign of change. Hard work and stress appear to increase rather than decrease longevity. 

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Cite this paper

@article{ORourke1976ThreeSA, title={Three score and ten.}, author={Diane O'Rourke}, journal={The Medical journal of Australia}, year={1976}, volume={1 11}, pages={356} }