What does the gravedigger find when digging ophelias grave?

When the gravedigger is digging Ophelia's grave in Shakespeare's "Hamlet," he discovers a skull, which prompts a reflection on mortality and the inevitability of death. The skull, identified as Yorick's, serves as a poignant reminder of the lives that have passed and the fate that awaits all. This moment underscores the play's themes of death and the transient nature of life, as well as Hamlet's contemplation of existence and the futility of human endeavors.