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the claim

Certain species have exceptionally long juvenile periods relative to their lifespan

the verdict
SUPPORTED
the evidence backs this
Recorded sources
4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Certain species, such as primates including humans and capuchin monkeys, exhibit unusually long juvenile periods and slow developmental pacing that correlate with extended overall lifespans.

The analysis

The retrieved literature consistently supports the premise that life-history trade-offs link slow development and extended juvenile periods with longevity across various taxa, particularly in primates and long-lived mammals.

Evidence for · 4
The genomics of ecological flexibility, large brains, and long lives in capuchin monkeys revealed with fecalFACS.
Recorded source metadata

Orkin JD, Montague MJ, Tejada-Martinez D, de Manuel M, Del Campo J, Cheves Hernandez S, Di Fiore A, Fontsere C, Hodgson JA, Janiak MC, Kuderna LFK, Lizano E, Martin MP, Niimura Y, Perry GH, Valverde CS, Tang J, Warren WC, de Magalhães JP, Kawamura S, Marquès-Bonet T, Krawetz R, Melin AD. The genomics of ecological flexibility, large brains, and long lives in capuchin monkeys revealed with fecalFACS.. 2021. https://doi.org/10.1073/pnas.2010632118

Capuchins exhibit exceptionally long lifespans exceeding 50 years despite small body size, associated with slow life-history traits.

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More for · 3
Relationships among Development, Growth, Body Size, Reproduction, Aging, and Longevity - Trade-Offs and Pace-Of-Life.
Recorded source metadata

Yuan R, Hascup E, Hascup K, Bartke A. Relationships among Development, Growth, Body Size, Reproduction, Aging, and Longevity - Trade-Offs and Pace-Of-Life.. 2023. https://doi.org/10.1134/s0006297923110020

Across species, slow development and late sexual maturation are broadly linked to long lifespans as part of a slow pace-of-life.

Ontogeny of Foraging Competence in Capuchin Monkeys (Cebus capucinus) for Easy versus Difficult to Acquire Fruits: A Test of the Needing to Learn Hypothesis.
Recorded source metadata

Eadie EC. Ontogeny of Foraging Competence in Capuchin Monkeys (Cebus capucinus) for Easy versus Difficult to Acquire Fruits: A Test of the Needing to Learn Hypothesis.. 2015. https://doi.org/10.1371/journal.pone.0138001

Capuchin monkeys are well-documented examples of species with notably long juvenile periods driven by the time required to learn difficult foraging skills.

Revisiting "Grandmothers and the Evolution of Human Longevity" 2003 AJHB https://doi.org/10.1002/ajhb.10156.
Recorded source metadata

Hawkes K. Revisiting "Grandmothers and the Evolution of Human Longevity" 2003 AJHB https://doi.org/10.1002/ajhb.10156.. 2025. https://doi.org/10.1002/ajhb.70045

Humans and related primates feature distinctively slow development and long juvenile periods coupled with extended overall lifespans.

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first checked01 Aug 2026
judged → SUPPORTED · 8501 Aug 2026
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