Daniel Kraft talk MARS.

Dr. Daniel Kraft visited NASA Johnson Space Center to talk about his vision of the future of medical technologies. Kraft is a physician-scientist who specializes in bone marrow transplantation, stem-cell biology and regenerative medicine. He has given several TED talks, some of which have been viewed more than 1 million times.
Johnson Space Center’s talkMARS presentations do not follow the model of a typical technical briefing. These talks focus more on the “why” of a human mission to Mars and translate complicated technologies and ideas in an easy-to-understand format.