Nununu Skull Evolution T-Shirtanyone who comes near the kid who wears this very cerebral black unisex t shirt gets a little anatomy lesson. right under our md skull patch, we have the definition of the skull with all the gritty details. the skull is a bony structure that forms the head in vertebrates,__ it says. it supports the structures of the face and provides a protective cavity for the brain___ there_s more, but you_ll just have to get the shirt to learn the rest. diagonally