An Italian veterinary researcher extracted stem cells from the fat tissue of 130 arthritic pooches and reinjected those cells back into the same 130 animals at the site of their arthritis. Results showed 88% of the tail-waggers exhibited improvement after 6 months. While results from animal studies don’t always translate to humans, this is just one more indication of the promising nature of stem cell therapy. Mel Gibson is a believer so you know it’s good. I mean, it’s not like he’s ever said or believed anything stupid or controversial, amiright? If you’re a relative novice in the ways of stem cells, read this Mayo Clinic primer on the topic.