In this episode, Peter discusses his belief that if we’re able to stay alive for the next 50 years, we will have access to converging technologies that can keep us alive indefinitely -- what Ray Kurzweil calls reaching “longevity escape velocity” Peter explains what stem cells are and why they have the ability to rejuvenate the body.  Peter and Dan discuss the Young Blood experiments at Stanford University and what this research means for rejuvenating the human body.