Evading death is the holy grail of adaptations, and humans only discovered it actually existed recently. The Turritopsis nutricula, more commonly known as the "immortal jellyfish" has evolved a staggering ability: it can return to its polyp (or infant) stage, and reboot its life from scratch. Can you imagine being able to just hit your belly button to become a kid again, only you'd get to keep the knowledge you earned in your adulthood? Talk about the best of both worlds! It's no wonder that the immortal jellyfish have had such great success since evolving this revolutionary trait. They've left their indigenous home in the Caribbean and have spread all over the globe.