It's not the size of the brain, it's the "brain-to-body mass ratio" that matters. http://en.wikipedia.org/wiki/Brain-to-body_mass_ratio http://en.wikipedia.org/

It's not the size of the brain, it's the "brain-to-body mass ratio" that matters. http://en.wikipedia.org/wiki/Brain-to-body_mass_ratio http://en.wikipedia.org/wiki/Brain-to-body_mass_ratio