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A life span, life expectancy, or life cycle is the maximum or average length of time a lifeform, material, or object is projected or capable of living or lasting. Having an effectively unlimited lifespan is referred to as Immortality.

The lifespan of humanoid species is known to vary from less than a decade to as long as several millennia. Some non-corporeal species have been known to have lifespans exceeding several millennia.

Comparative life spans

For truly immortal species; see Immortality.

The Capellan flower, native of Capella IV, had a life span of only a few hours. (TAS: "The Counter-Clock Incident")

The swarming moths of Gonal IV had a life span of only twenty hours. Jay Gordon Graas analyzed the insects' life span as part of his primary school science fair project in 2368. (TNG: "Disaster")

The Lyssarrian desert larvae, after becoming a mimetic simbiot exactly replicated the life cycle of the species it is mimicking at a rapidly accelerated rate. On average, the simbiot was born, grew old and died in approximately fifteen days. (ENT: "Similitude")

The Ocampa had a lifespan of only nine years. (VOY: "Caretaker", "Before and After", "Fury") Suspiria developed technology that helped extend the Ocampa life span, Tanis' father for example lived to be twenty years of age. (VOY: "Cold Fire")

Following an autopsy of a Xindi-Insectoid, Doctor Phlox projected that this species of Xindi only had the lifespan of about twelve Earth years. He then suggested that the Insectoid he conducted his autopsy on was about ten years of age, and was likely an "Honored Elder." (ENT: "Hatchery")

Most Jem'Hadar died young in battle; as such, it was rare for them to live past fifteen years of age. Few ever lived to the age of twenty, and those who do were awarded the title "Honored Elders." As of the Dominion War, No Jem'Hadar has ever lived to the age of 30. (DS9: "To the Death")

During the 24th century, Bajorans could live to at least 100 years. Els Renora was one such individual to live to the century mark. (DS9: "Dax")

Antarans of the 22nd century were thought to generally live at least 60 years. (ENT: "The Breach")

This is a lower limit, as Hudak, the Antaran featured, was said to be able to live for another 60 years by Phlox. Assuming that Antarans mature at the same rate as humans, and that Hudak is thus about 49 just like his actor at the time of filming, a normal lifespan of about 110 years can be speculated. It should be noted that Phlox' knowledge on Antaran biology might be sketchy, a fact he himself acknowledged.

The average Human life span had gradually increased during their history. the average life spans during the 22nd century was about 100 years (ENT: "Observer Effect"). This average age was still roughly the same during the 2250, but had risen to 120 by the mid-24th century. (citation needededit). However, at some point in history the average lifespan for Humans was only 35, and by 1999 it had become higher than a millennium earlier. (ENT: "Similitude", VOY: "11:59"). Leonard McCoy had by 2364 reached the age of 137. (TNG: "Encounter at Farpoint").

Making him the oldest confirmed Human seen in Star Trek, with the exception of Flint and users of suspended animation-like technology

Despite the normal limit on human age, at least one human, Flint, lived for 6000 years for unknown reasons which were somehow dependent on the Earth's environment. (TOS: "Requiem for Methuselah") Another exception were Human Augments, which had life spans twice as long as those of regular 22nd century Humans. (ENT: "Borderland")

Klingons were capable of living well over a century in age. Individuals such as Kang, Koloth, Kor and Arne Darvin lived well over one hundred years. (DS9: "Blood Oath", "Trials and Tribble-ations", "Once More Unto the Breach")

No exact lifespan has been given for Klingons, just approximates. In 2370, Odo observed that Kor "must be a hundred years old" and his "best friend," Koloth, was "probably a hundred and fifty years old." This observation was made over 100 years after their encounter with James Kirk.

Vulcans were known to have life spans of 200 years, which was considered to be exceptionally long by Federation standards. (ENT: "Broken Bow";TNG: "Unification I") Sarek of Vulcan lived to be 203 years of age. (TNG: "Sarek") However, at some point in their history, the average lifespan of Vulcans was only 40. (ENT: "Similitude"). Trip Tucker scoffed at the idea of Mestral, a Vulcan who lived on Earth beginning in the 20th century, remained there for the rest of his life, which could have been longer than 150 years. Tucker was especially adverse to the idea that a Vulcan could live the rest of his lifespan on Earth, unnoticed, from the 1950s through a period of time that included the terms of 30 United States Presidents. (ENT: "Carbon Creek")

Krenim could live at least 200 years. (VOY: "Year of Hell")

This is based on Annorax captioning the Krenim weapon ship for so long. However, since he didn't visually age during that time, Krenim lifespans might be significantly longer.

At least one Kriosian, Briam, reached 200 years, which was considered old. (TNG: "The Perfect Mate")

The Valtese, being closely related, might have had similar life expectancies.

The Talosians had life spans that were many times that of a Human's. (TOS: "The Cage")

Trill symbionts were capable of living at least over 550 years. Trill hosts however lived significantly shorter, resulting in a symbiont usually occupying many different hosts during it's lifetime.

The Dax symbiont lived over 357 years in ten hosts. (DS9: "You Are Cordially Invited"). In addition, in an alternate timeline where Jadzia Dax crashed on Gaia, it survived another 200 years.

Changelings had an expected life span of at least several centuries. (DS9: "Emissary", "The Search, Part II"

This can be deduced from the fact that Odo was sent out at the latest in 2337, and wasn't expected to return until the 27th century.

The Axanar had an average life span of 400 years. (ENT: "Fight or Flight") Tarquin's species also lived for at least 400 years. Tarquin remarked that few species have lifespans as long as his. (ENT: "Exile")

El-Aurians life spans were at least several hundred years. (TNG: "Q Who") Guinan was also on Earth during the late 19th Century, making her at least 490 years old. (TNG: "Time's Arrow", "Time's Arrow, Part II"). The El-Aurian Doctor Tolian Soran was reported to be "over three hundred years old" in his biographical information.(Star Trek Generations)

The Redjac entity had an extremely long lifespan, at least 379 years. It was speculated by Spock to be virtually immortal. (TOS: "Wolf in the Fold")

While the lifespan of regular Horta is unknown, the Mother Horta lived for 50,000 years. TOS: "The Devil in the Dark")

Cheron natives were also known to be extremely long lived. Bele claimed to have pursued Lokai for more than 50,000 years (TOS: "Let That Be Your Last Battlefield")

Bevvox, a bioplasmic organism who lived alone for a few millennia, was said to be somewhat sensitive about his age. (VOY: "Think Tank")

Another type of bioplasmic organism, the Telepathic pitcher plant, was estimated to be at least 200,000 years old. (VOY: "Bliss")

Borg life spans were the natural life span of whatever species the drone was originally assimilated from, except when the individual was assimilated as a child, in which case maturation was accelerated. (VOY: "Survival Instinct", "Collective")

Additionally, a deleted scene from ENT: "" established the Rigellian parrot as a bird known for its very long lifespan. Phlox was nonetheless surprised when it was still alive 117 years after he left it.
While Denobulan life spans were never specified, Phlox once told Archer that they live "a long time".
Star Trek: Insurrection saw a group of Son'a a bit more then a century old, which were employing extensive life extension techniques yet who seemed to be at the limit of how far technology could bring them. Therefore, the natural life spans of Son'a and Ba'ku were presumably not much longer then a century at most.

Reduction of lifespan

Several natural and unnatural conditions have been encountered that are known to hasten the aging process. For example, radiation has been known to accelerate aging, dramatically. (TOS: "The Deadly Years") In 2365, a freak Thelusian flu antibody reaction caused a similarly rapid aging. (TNG: "Unnatural Selection")

Delta radiation, emitted by mirror universe warp five engines, was also very harmful. It was said that, for each year a Human spent working next to a warp core, he lost a decade of his life. (ENT: "In a Mirror, Darkly")

For slow and fatal diseases, a revised life expectancy was also usually given. As part of a (possibly false) diagnose of Tuvan Syndrome, Koval was expected to live another 20 or 25 years. (DS9: "Inter Arma Enim Silent Leges") After Quark was diagnosed with Dorek Syndrome, he was told that he had only about six days to live. (DS9: "Body Parts") More humorously, Julian Bashir claimed that, due to the extreme old age associated with winning, the life expectancy for a Carrington Award winner was five to ten years. (DS9: "Prophet Motive")

More elementary, lifestyle conditions could also drastically reduce life expectancy. The life expectancy for prisoners sent to Rura Penthe was six months to a year. (ENT: "Judgment")

Extension of lifespan

For methods of Rejuvenation (as opposed to just prolonging life), see Rejuvenation.

Likewise, several methods have also been found to slow the aging process. Both Humans and Vulcans had throughout their history successfully spent a lot of effort to heighten the average lifespans of their species. (ENT: "Similitude")

On the Dinaali homeworld some people were given Cytoglobin injections to prevent arterial aging and thus increase life expectancy by 40%. (VOY: "Critical Care")

Doctor Elias Giger claimed that his Cellular regeneration and entertainment chamber could effectively grant immortality, but this claim was considered dubious by the Federation scientific establishment. (DS9: "In the Cards").

The Son'a also applied intriguing methods of enhancing their life spans. (Star Trek: Insurrection)

The Kobliad, a dying race due to cellular degeneration, were able to nonetheless prolong their lifespan using deuridium to stabilize their cell structure. A Kobliad named Rao Vantika went further and tried to prolong his death by experimenting with rejuvenation drugs, cryogenics, and organ transplants. (DS9: "The Passenger")

Appart from actual changes in the pace of aging, The use of technologies like cryonics, stasis chambers and even transporters have allowed individuals to temporary suspend their lives and therefore live into eras their normal lifespans would not have normally allowed them to live. (TOS: "Space Seed"; TNG: "The Neutral Zone", "The Emissary", "Relics"; VOY: "The 37's")

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