Ron Reagan made waves this week, speaking before the Democratic National Convention in favor of stem cell research. In this hour of Science Friday, NPR's Ira Flatow and guests look at new research into how transplanted stem cells might be used to treat stroke.
Gary K. Steinberg, M.D., Ph.D. Chairman, Department of Neurosurgery. Lacroute-Hearst professor, neurosurgery. Co-director of the Stanford Stroke Center at the Stanford University School of Medicine.