When Oscar the cat got both of his back legs severed by a harvester, his prognosis was undoubtedly grim. Luckily for him, he was referred to a veterinarian, Noel Fitzpatrick, who had some pretty interesting ideas of his own. Dr. Fitzpatrick has successfully given the cat two back prosthetic legs, but they're completely unlike any prosthetic we've ever seen. Oscar's been given Itaps (intraosseous transcutaneous amputation prosthetics) which were developed at University College London. Itaps are custom made pegs which allow the bone and skin to grow to them, meaning that the "prosthetic" actually becomes part of the appendage itself. The surgery has been in testing for humans since 2005, and this one was the first performed on an animal. Hit up the BBC source link to check out a video of the kitty getting mobile.