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1️⃣ Biological Immortality Exists There is a creature that can rewind its life. Not slow aging. Not regenerate. Actually reset. The jellyfish Turritopsis dohrnii can revert from an adult back into its juvenile polyp stage. Adult to polyp, and to new life. The process is called transdifferentiation. Its cells change identity. Its biological age resets. Genetic studies show enhanced protection of telomeres — the DNA “caps” that shorten as we age. In theory — it can avoid natural death.