Damn there are some good stories floating around today!

Check this one out from Wired about using stem cells to regenerate human muscle and bone. Vets have apparently been doing it to horses for sometime now, with some amazing results.  One of the vets cited has a horse jumping in the Olympics who had the procedure done.

I have been reading a fascinating book, The Body Electric: Electromagnetism and the Foundation of Life, on a similar topic–regeneration and electromagnetism. It's a scientific doozy though so I am only about 2 chapters in. But so far I am familiar with how a salamander can regrow limbs.