https://en.wikipedia.org/wiki/Brain-to-body_mass_ratio https://en.wikipedia.org/wiki/Brain-to-body_mass_ratio With an extra caveat: > Recent research indicate

https://en.wikipedia.org/wiki/Brain-to-body_mass_ratio https://en.wikipedia.org/wiki/Brain-to-body_mass_ratio With an extra caveat: > Recent research indicates that, in non-human primates, whole brain size is a better measure of cognitive abilities than brain-to-body mass ratio. The total weight of the species is greater than the predicted sample only if the frontal lobe is adjusted for spatial relation.[18] The brain-to-body mass ratio was however found to be an excellent predictor of variation in problem solving abilities among carnivoran mammals.[19]