In my undergrad, a few students worked with axo's. They did different experiments with their limb regeneration, so I have seen ones with regenerated limbs, ones that have grown back deformed and such. They also were successful in re-attaching the limbs to the axo's. This research is very viable, in that they're trying to find new ways to re-attach limbs on these animals so that it might be translated to humans. There were several hundred of them in our labs. Unfortunately, they were housed in very small enclosures. Once in a while the professor would give students the axo's as pets when they'd gotten bigger or they were done with them.
I think they're amazing critters, I wish I'd had room for one when she was giving them out!!
I think they're amazing critters, I wish I'd had room for one when she was giving them out!!