Forehead is high to accommodate our large brains. Brow ridges are small due to weaker jaw muscles and the presence of the forehead.
The large forehead and rounded shape of the cranium accommodates our larger (about 1300 cc) brains.
Jaws do not protrude, creating a flat profile of the face.
Jaws and teeth are much smaller, reflecting our reliance on meat and processed foods.
The foramen magnum is located in the center of the skull, which places the head directly above the spinal cord and enables us to walk upright comfortably.