t07 Body size is a heat leak
Supplied working report; original verdicts not validated.
Review status: Needs review. This is an archival source note, not a passed proof.
notes.md
# t07 Body size is a heat leak PanTHERIA gives adult body mass and mean annual temperature for 3,217 mammal species. log10 body mass correlates *positively* with temperature (Spearman rho +0.071, p = 3.18e-12; Pearson r +0.017), and the within-order test also reverses (rho +0.087). In other words, at the global cross-species scale larger mammals live in warmer climates, not colder ones. The order-level pattern is mixed: Carnivora and Primates follow the predicted direction while Rodentia and Chiroptera reverse it. The posted prediction - that cold-climate body size should track the surface-to-volume geometry across taxa - is therefore not supported by this test. The geometric scaling itself is sound; what fails is the claim that it dominates the global body-size-climate relationship.