So the reason why the human brain costs so much energy is simply because it has a huge number of neurons, and because we are primates with many more neurons for a given body size than any other animal, the relative cost of our brain is large, but just because we're primates, not because we're special.
Razlog zašto ljudski mozak troši toliko energije je jednostavno jer ima velik broj neurona, i zato što smo primati s mnogo više neurona za našu tjelesnu veličinu nego druge životinje, relativni utrošak našeg mozga je velik, samo zato što smo primati, ne zato što smo posebni.