$$$$$$$$$$$$$$$$$“”“”“”“”““”““”““”““”“”The-axolotl-can-regenerate-its-limbs,-spinal-cord,-and-even-parts-of-its-heart,-a-capability-that-has-positioned-it-as-a-critical-model-organism-for-studies-in-regenerative-medicine.“`”“`“”“$$$$$““”“””$$$$$$$$$$$$$$$$