"In the animal kingdom, there is a type of jellyfish called the immortal jellyfish (scientifically known as Turritopsis dohrnii). What makes it fascinating is its ability to revert back to its earliest form after reaching adulthood. When facing environmental stress or old age, it can transform its cells, essentially returning to a polyp stage and then growing into a new adult jellyfish. This process can theoretically repeat indefinitely, hence the name "immortal jellyfish." While it's not truly immortal in the sense of living forever, it has an exceptional regenerative capability that allows it to bypass the typical life cycle limitations of other organisms."