Restoring body parts does not usually happen to human beings unless we have some superhero powers which is quite impossible for us to have; although, it is possible for some animals such as flatworms, hydra, and young frogs. The most impressive species, however, are axolotls! They are vertebrates that can regenerate multiple structures throughout their entire lives. These include their limbs, jaws, tail, spinal cord, skin, and even internal organs like their lungs, heart, and brain!