We cannot deceive aging and death: new insights into the “hypothesis of constant aging rate”
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Fernando Corcello said: “Human death is inevitable. No matter how many vitamins we take, how healthy our environment is, or how much exercise we have, we will eventually age and die.” He is an expert in the application of statistics and mathematics to population biology. , Is an associate professor in the Department of Mathematics and Computer Science at the University of Southern Denmark. “We were able to compare the birth and death patterns of 9 human populations with information from 30 non-human primate populations, including gorillas, chimpanzees and baboons living in the wild and zoos by combining a large amount of data that has not been presented before. , To clarify the hypothesis that the aging rate is constant.”
To explore this hypothesis, the researchers analyzed the relationship between life expectancy (this is the average age at which individuals in a population die) and life equality. Lifespan equality measures the concentration of deaths in old age.
Their results show that as life expectancy increases, so does life equality. Therefore, when most people in a population tend to die at the same age, life equality is very high, as observed in modern Japan or Sweden-approximately 70 or 80 years old. However, in the 19th century, lifespan equality in these countries was very low, because deaths were not concentrated in old age, which also led to lower life expectancy.
“Life expectancy has increased greatly, and it is still the case in many parts of the world. But this is not because we have slowed down the rate of aging; the reason is that more and more babies, children, and young people are surviving. It increases the average life expectancy,” Fernando Corcello said.
Previous studies by some of the authors of this study have uncovered the surprising regularity between life expectancy and lifespan equality in the human population, from pre-industrial European countries, hunter-gatherers, to modern industrialized countries.
However, by exploring these patterns in our close relatives, this study shows that this pattern may be common in primates, and it provides a unique mechanism for generating this pattern. Insights.
“We have observed that not only humans, but also other primate species exposed to different environments, have successfully extended lifespan by reducing infant and adolescent mortality. However, this relationship This is only true if we reduce the early mortality rate, not by reducing the rate of aging.”
The author uses statistics and mathematics to show that even a small change in the aging rate will make a population, For example, baboons, demographically behave like chimpanzees or even humans.