According to a new method of estimating the life span of different races by analyzing DNA, the “natural” life span of humans is 38 years. The study was published in the journal Scientific Reports. DNA is the blueprint for life and an ideal place to gain insight into aging and longevity. But no differences in DNA sequences have been found to explain differences in life expectancy.
In the past few years, researchers have begun using DNA methylation to determine the life span of animals. DNA methylation does not change the sequence of genes but controls the activity of genes, and DNA methylation of specific genes has been found to be associated with the maximum lifespan of primates.
Using 252 genomes of vertebrates, the researchers combined life-life data to estimate life by analyzing DNA methylation of 42 specific genes. They found that the longest-lived vertebrate right whale had a life span of 268 years, an extinct mammoth at 60 years, an extinct Pintha island elephant turtle at 120 years, a close relative of man Neanderthals and Denisovans at 37.8 years, while a human had a life span of 38 years.
Medical advances and lifestyles have prolonged human life, the researchers believe.