For now, here's what we know — and what we don't know — about stem cell therapy for knees. In Johnson's pursuit of "superhero joints," he flew to Physical Longevity, the Bahamian clinic that ...
An arthritic 28-year-old vulture has been given a stem-cell treatment at a vet in what conservationists ... the bird equivalent of a knee. "It was slowing down his movement," said Holly Cale ...