I remember seeing a story on BBC a while ago about how one guy, who lost the top portion of his finger while operating a toy in his hobby shop, was able to regr

I remember seeing a story on BBC a while ago about how one guy, who lost the top portion of his finger while operating a toy in his hobby shop, was able to regrow it completely. It only took 4 weeks to regrow, including the nails, fingerprints et al., exactly as it was before using extracellular protein from pig bladder. Here is a link to the story: https://www.youtube.com/watch?v=NEnLK0oJCa8 https://www.youtube.com/watch?v=NEnLK0oJCa8