Reply #13: To a degree. Large brains need large bodies. [View All]

[Cetacea]

Elephants have larger brains than humans. But they have to deal with gravity and more of the brain is dedicated to motor functions.

After the elephants it is some of the dolphins and whales, who essentially live in a weightless environment, who have larger brains than humans. The additional brain mass is in the same areas that separate us from the apes. Not only are these areas larger, but there are more folds, or convolutions, in the cortical mass. If you look at brain comparison images of different species you'll see the convolutions increase relative to their intelligence.