In this week’s Medical Discovery News with UTMB’s David Niesel and Norbert Herzog: Scientists had long believed that once stem cells turned into a specific type of cell, they were mature and forever locked in that role. But this year’s Nobel Prize winners in physiology or medicine, John B. Gurdon and Shinya Yamanaka, disproved this dogma by discovering that specialized, fully developed cells can be reprogrammed back into undifferentiated states.