I do not know biology, but I notice that human skull have a particular form that is like a upward spike and other skulls which are only oval.
But the first type skull, go up, I mean first the forehead is a little inclined and then rises to the top of the head making the front of the skull smaller than the rest of the head.
While the oval skull is of equal size both, in front of the skull and the rest of the head.
My question is whether this is relevant to brain size or brain capacity? I mean people who have the first skull has a slightly smaller brain than people who have an oval skull or if it does not matter the shape of the skull and people can have the brain of the same size no matter what type of skull they have.
Besides that if because the first skull has that form, somehow affects the performance of the brain, since good part of the skull is smaller than the other and not in equal size like the oval skull and because of that the brain has a bit of complication.