The Jellyfish That Never Dies

The immortal jellyfish possesses the uncanny ability to reverse its life cycle. Instead of dying, it reverts from a mature adult back into a juvenile polyp, effectively restarting its life from scratch.

When this creature faces physical damage or starvation, it triggers a process called transdifferentiation. It essentially transforms its mature cells into brand new, younger versions of itself. While it can technically live forever, most are still eaten by predators or succumb to diseases in the wild. This biological loophole makes it a fascinating subject for scientists studying the secrets of aging.