Axolotls (famous for their text book example of neotony or becoming sexually mature but never fully physically mature) can also regenerate lost limbs, something that biomedical engineering has been looking into for some time now, and is inching ever closer as stem cell research has been given the green light.
Answers to medical problems will be found in nature, and evolution will be the greatest teacher the human species ever had.
The article is from sciencenews.org, check it out
