Doctors can transplant all manner of body parts these days, from hearts to ears to dongs (probably). And now it seems like you can put heads on that list. Heads. Your head. Or someone else's head on your body, assuming your body is free and in need of a new head.
Up until now there were a few barriers in the way of a proper head transplant. The big hurdle, of course, is that you need a head, and so does everyone else. Got a bodiless head and a headless body? That's two dead guys. But say you have them on ice and they're still fresh and mostly free from freezer burn -- now what? Any morbid maniac with a needle and thread could technically sew those things together, but hey, you could sew a patch that says "Belieber 4 Life" onto your own scrotum -- it doesn't mean you should, and it doesn't mean you'll benefit from it in any way.
The big problem with a head transplant is making the body work after the head is attached. They've been sewing animal heads on new bodies all holus-bolus since the 1970s, but the resulting frankenpoodles were all paralyzed because reattaching the spinal cord is hard as s**t to do. Or it used to be. Because thanks to research by the Turin Advanced Neuromodulation Group, the problems with reattaching that spinal column have been overcome, and now we can all swap noggins!