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Among mammals, larger body size correlates with longer 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.

Is it true that among mammals, larger body size correlates with longer lifespan?

Yes. A review article states that the positive correlation between adult body size and maximal lifespan across all mammalian species is well documented and striking, while noting exceptions such as bats and naked mole rats. A life-table analysis of 29 eutherian mammals and a cockroach study's background also report larger mammals having greater life expectancy.

Verdict: SUPPORTED · 4 sources for, 0 against · Last checked

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Evidence for · 4
Relationships among Development, Growth, Body Size, Reproduction, Aging, and Longevity – Trade-Offs and Pace-Of-Life -
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Relationships among Development, Growth, Body Size, Reproduction, Aging, and Longevity – Trade-Offs and Pace-Of-Life - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1134/S0006297923110020

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More for · 3
Social Organisation Predicts Lifespan in Mammals.
2026
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OR, J., K, H., & JA, J. (2026). Social Organisation Predicts Lifespan in Mammals.. doi.org. https://doi.org/10.1002/ece3.73587

Size Matters: Body Size is Correlated with Longevity in Speckled Cockroaches (Nauphoeta cineria).
2021
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Badwan, S. & Harper, J. (2021). Size Matters: Body Size is Correlated with Longevity in Speckled Cockroaches (Nauphoeta cineria).. doi.org. https://doi.org/10.2174/1874609814666210728170119

Life Histories of Mammals: An Analysis of Life Tables
Get citation
Life Histories of Mammals: An Analysis of Life Tables. (n.d.). cir.nii.ac.jp. https://doi.org/10.2307/1937181

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