A species of jellyfish called Turritopsis dohrnii can revert its adult cells back to a juvenile polyp stage when injured or starving, effectively restarting its life cycle, and biologists have so far failed to identify any natural limit to how many times it can do this. Saving Tips June 10, 2026 In a lab tank at the Shirahama Aquarium on the Pacific coast of Japan, a jellyfish smaller than a pinky…
