Question of why we age, The

As demonstrated by the existence of biologically immortal species like the Tardigrade, there is no thermodynamic necessity for senescence: a defining feature of life is that it takes in free energy from the environment and unloads its entropy as waste. Living systems can even build themselves up from seed, and routinely repair themselves. Ageing is therefore presumed to be a byproduct of evolution, but why mortality should be selected for remains a subject of research and debate. The popular academic Carle Jovian has argued that because organisms have offspring before the mortal mutations surface in an individual, it is more correct to say that ageing is never selected against.

Age-retardation procedures may provide humans with biological immortality, though this is debated by Sudden Decline Theorists, such procedures would not grant invulnerability to death by physical trauma. According to 2066 statistical data, the odds of an individual being traumatically killed are once in every one thousand and seven hundred years.

— Galen Rightonbark

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