Gholas are a fictional concept from Frank Herbert's science fiction series, particularly in the Dune universe. They are essentially clones created from the cells of deceased individuals, designed to replicate the original person's physical appearance and memories. However, gholas initially lack the memories of their past lives, which can sometimes be restored through specific triggers or experiences. In the Dune series, gholas serve various purposes, including exploration of identity and the nature of consciousness. They raise philosophical questions about what it means to be human and the implications of cloning technology. The most notable ghola is Duncan Idaho, a character who is resurrected multiple times throughout the series.