Bergmann’s rule: animals in colder climates have larger bodies than members of the same species (or subspecies) in warmer climates. Allen’s rule: limb lengths

Bergmann’s rule: animals in colder climates have larger bodies than members of the same species (or subspecies) in warmer climates. Allen’s rule: limb lengths vary according to climate. Limbs are longer in warmer climates. Both rules observed in human populations over time. https://en.wikipedia.org/wiki/Cold_and_heat_adaptations_in_humans https://en.wikipedia.org/wiki/Cold_and_heat_adaptations_in_h...