A closer look
Turritopsis dohrnii is a species of jellyfish that is biologically immortal and can completely revert its cells back to their earliest developmental stage when injured or facing starvation. Instead of dying, this tiny ocean dweller just hits the reset button and starts its life over as a polyp, essentially becoming a baby again to avoid the grim reaper. Science fiction writers have spent centuries dreaming up complex technological pathways to eternal youth, while a squishy gelatinous bell the size of your pinky nail figured it out millions of years ago. Of course, they still get eaten by predators, which is a hilarious cosmic joke. You achieve the pinnacle of biological immortality, defying the fundamental laws of aging, only to become a casual mid-afternoon snack for a passing sea turtle
