Demographer Elisabetta Barbie of the Sapienza University of Rome has looked at reports from the Italian National Institute of Statistics for evidence of a "death plateau" theory for humans. This phenomenon is known and proven for the simplest creatures, fruit flies and nematodes - but in humans? Italian municipalities are very passionate about birth and death control, which provides a field for research.
All living things age, become more decrepit and sickly, in different ways. But there is a general rule - the older the individual, the higher the risks of injury or death. For example, a 50-year-old is three times more likely to break a femur than a 30-year-old. After 60 years, the probability of death doubles every 8 years, and the chances of living at least a year after the turn of the century is only 40%.
The mortality plateau is a milestone after which all probabilities are erased, become the same. For a person, it is calculated as 105 years, after which the probability of death due to "old age" never changes. Health will not increase, this is a fact, but it also stops decreasing, remains at a certain small level, when the impact of a random factor can cause death.
Elisabetta Barbie collected data on 3836 long-livers in Italy, which indirectly confirmed the theory - after 105 years, the illnesses do not increase or they cease to matter. This is explained by the fact that only the initially strongest individuals survive to this age, with a special genotype, in which there are no pathologies that could cause illness and death in earlier years. If this is the case, then we can find the key to longevity by studying the genes of these people - even if we do not yet know how to pass beneficial anomalies to newborns without violating numerous legal and moral norms.