An article in the January 25, 2008, issue of Cell describes research showing that progenitor beta cells exist in the mouse pancreas and that, when prompted by injury to the pancreas, the cells respond by growing and producing insulin. The authors are all associated with the JDRF Center for Beta Cell Therapy in Diabetes in Brussels, Belgium. (Yay, JDRF!) Read the original article or a summary at ScienceDaily for more info. If they find that this is also true for humans, it will be a very exciting discovery with many implications.