Immortality refers to the ability to live forever or to exist indefinitely without dying. This concept has been explored in various cultures and religions, often associated with deities or mythical beings. In science, immortality can also relate to biological processes, such as the study of cells that can divide indefinitely, like certain types of cancer cells. The idea of immortality raises philosophical questions about the nature of life and death. It has been a popular theme in literature and film, often depicted through characters who seek eternal life, such as vampires or gods. Discussions about immortality also touch on ethical considerations regarding the implications of living forever.