 This episode of Let's Talk Surgery is going to be really short, it's almost like a tweet. Now, the last couple of days we've been celebrating the life of Chris Barnard, the first heart transplant here at Hriderskeer Hospital in Cape Town, and it has had an enormous impact. So many people's lives saved and changed by that first heart transplant. Now, there's someone else's work I want to talk to you about in this episode. There's someone else whose work has had a much, much larger impact in the medicine. And it's someone who we almost never talk about. Of course, that is Alan Kormak. Now, Alan Kormak was born in Johannesburg, 1927, and he received his BSc in physics here at the University of Cape Town. And it is while he was working at Hriderskeer Hospital that he did some work that ultimately led to him winning the Nobel Prize in Physiology and Medicine in 1979. And that, of course, was the mathematical underpinnings of the CT scanner. Really, a fundamental part of our daily work we can do very little these days without a CT scanner. I'm going to leave some links in the description below. So, read up, find out more about Alan Kormak. There's even a book, a biography of Alan Kormak that you can buy right on Amazon. Find out more about him.