The Biblical patriarchs’ longevity from Noah through Joseph declines by logarithmic curve (exponential decay) given by Lifespan (years) = /τ 6664 dob e− × where e = 2.718... is nature’s constant, and dob is the patriarchs’ dates of birth since Adam, and τ = exponential time constant = 563 years. The equation was obtained by the natural logarithms’ linear regression Ln (lifespan) = 8.804 – 0.00177· dob The logarithmic graph’s estimate of the standard deviation (s.d.) is 0.263; the correlation coefficient is (–0.850). Ten (71%) of the data fit within the first standard deviation; the other four within two. The life span equation predicts 68 years of longevity at the time of Moses 1500 years from the flood (2580 years after Adam). The effect of Shem’s uncertain date of birth (not Noah’s firstborn son) is evaluated for its effect on standard deviation, the time constant τ, and the correlation coefficient, which will be shown to not undermine this paper’s compelling reason of using a logarithmic curve, i.e., as the most common curve in nature and, within nature, in engineering systems. This single correlation between Genesis life spans and the years following the Flood is of interpretable value to report again to review the work that has been done on this subject since 1948, to incorporate RATE project results, present the time-based analysis’s correlation coefficient, express the natural (Naperian, base e) curve as part of a family of the universe’s most common curve, the logarithmic curve, introduce common knowledge of life span during Joseph’s time, explore anomalies in relation to space expansion, and to present more information that discusses the statistical outliers and supports Moses’ recorded life spans.