Aging is not senescence: a short computer demonstration and implications for medical practice

Area of Science:

• Evolutionary Biology
• Gerontology

Background:

• The evolutionary basis of senescence remains a significant unresolved problem in biology.
• Reconciling natural selection with senescence, which appears disadvantageous to individuals, is a key challenge.

Purpose of the Study:

• To present a computer simulation illustrating an evolutionary mechanism for senescence development.
• To critically evaluate popular explanations for the existence of senescence.

Main Methods:

• Computer simulation of evolutionary mechanisms.
• Analysis of established theories on senescence.

Main Results:

• The study refutes two common explanations: removal of elders for species benefit and organic deterioration from use.
• Senescence, defined as progressive physiological impairment, is distinct from aging (passage of time).

Conclusions:

• Certain conditions previously considered part of aging should be reclassified as diseases.
• Understanding the distinction between aging, senescence, and senility (pathological diseases) is crucial for physicians.
• Clarifying senescence's limitations is important for medical practice and understanding living organisms.