Animals face strict physical size limitations due to scaling laws of metabolic rate and skeletal support
Multiple studies demonstrate that animals are subject to strict allometric scaling laws regarding metabolic rates, skeletal support, and biomechanical limitations as body size increases.
The retrieved papers provide robust evidence supporting the claim that animals face physical size limitations dictated by allometric scaling laws of metabolic rate, surface area-volume constraints, and biomechanical/skeletal limitations (such as those affecting maximum speed and locomotion in giant forms). Papers [0], [4], and [11] explicitly discuss these physical and physiological constraints without any papers refuting the premise.
Douglas Glazier. Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate. 2018. https://doi.org/10.3390/challe9010004
Discusses physical and geometric constraints related to metabolic scaling and surface area-volume relationships.
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Lu B, Wang J, Ribbers E, Hendriks J, Lautz L. Allometry of organ mass, blood flow and metabolic rate in relation to body mass in mammalian species. 2026. https://doi.org/10.21203/rs.3.rs-10022332/v1
Establishes how body size inherently influences animal function and physiological scaling relationships across species.
Ruiz J, Romilio A, Saarinen J, Torices A, Jiménez-Arenas JM. The body mass-maximum speed relationship and the athletic capability of giant proboscideans and sauropods.. 2025. https://doi.org/10.1038/s41598-025-32536-3
Demonstrates that massive body mass imposes severe limitations on bones, joints, forces, and overall locomotion limits in giant animals.
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