Are We Approaching a Biological Limit to Human Longevity?

Area of Science:

• Gerontology
• Demography
• Biostatistics

Background:

• Historical data suggested continuous growth in human longevity with no apparent limit.
• Previous studies indicated a mortality plateau at advanced ages, implying no fixed upper bound for lifespan.

Purpose of the Study:

• To re-examine claims of unlimited human longevity using recent supercentenarian data.
• To investigate trends in maximum lifespan and age-specific mortality rates in older populations.

Main Methods:

• Analysis of recent, reliable data on supercentenarians (individuals aged 110+).
• Examination of trends in maximum reported age at death across birth cohorts.
• Assessment of age-specific death rates for individuals older than 113 years.

Main Results:

• A significant slowdown in the growth of human longevity records for cohorts born after 1879.
• An exponential acceleration in age-specific death rates observed after age 113 in recent data.
• Empirical support for the hypothesis of an approaching biological limit to human longevity.

Conclusions:

• Progress in maximum human lifespan has plateaued, challenging previous assumptions.
• Accelerated mortality post-113 years suggests a potential biological limit.
• Future longevity projections require conservative estimates unless significant anti-aging interventions emerge.