Are people born with cracked sculls?

Answer 1

No. The skull is not cracked at birth. It is just not yet fused into one bone. Babies have several skull plates. The edges can usually be felt as gaps and often soon after birth some of them will ride up over their neighbors forming ridges that you can feel. Over the course of the first year the plates grow to take the shape of the skull and the borders between them fuse together. In an adult skull those border fusion sites can still be seen (if the skin is peled away) and are called sutures.