The world is home to some of the most unique and unusual animals that you may have never heard of. For instance, the axolotl, a type of salamander found in Mexico, has the ability to regenerate its limbs and spinal cord. The platypus, found in Australia, is one of the few mammals that lay eggs instead of giving birth to live young. Another unusual animal is the aye-aye, a lemur found in Madagascar that has elongated fingers used to extract insects from wood.