This jellyfish can live forever

Meet the Turritopsis dohrnii, a jellyfish species that can biologically reverse its aging process. When faced with injury, sickness, or old age, it simply transforms back into its juvenile polyp form. This remarkable creature can then grow up again, potentially repeating the cycle indefinitely. Scientists have observed this 'immortality' in labs, where mature cells convert into entirely different cell types, a process called transdifferentiation. This ability to essentially hit a 'reset' button challenges conventional biological understanding. While it can still fall prey to predators or disease, it never dies of old age, offering unique insights for regenerative medicine.