and almost within weeks of that, michael debaky, who then was the most famous surgeon in the world said we are going to have an artifical heart in ten years and i think people had a sense, a, they had a sense of possibility, of endless possibility. and what interested me is, we got to the moon in ten years and we still don't have a completely implantable an artifical heart and i think that almost the some kind of arrogance, tinged with this, that the body was more complicated that and rocket. >> that was my next question, some kind of designing an artifical heart is a lot more complicated than designing an artifical knee or an artifical hip. >> dr. fraser who worked on this for 50 years, there's really only two problems and the main problem is the destruction of the blood for you wonky docs in the room. and the other problem was a heart that, your heartbeats 100,000 times a day, and to replicate that, doctors kept trying to make a machine that would do that, that would pump over and over. those pumps couldn't last more than two years. so if you had one of those pums pumps you would be b