Do you wish you could turn into a kid and then stay there? There are a few animal species that can actually perform this age-defying magic trick. A small jellyfish found in the waters of Japan and the Mediterranean Sea, the Turritopsis, is a “biologically immortal” jellyfish that will turn itself into child once it reaches adulthood or it feels old and sick. It brings a brand new meaning to “If I could turn back time …”