From a lab in the Sahara, where one problem is sand in the petri dishes, to an Israeli lab that narrowly escapes a terrorist bomb, stem cells have gone global. Not only are the cells studied in an escalating number of labsand landsbut they are already being used. In Japan, a respected doctor uses the cells to make small women better endowed. In Connecticut, stem cell technology has created cloned cows that roam the hills displaying eerily identical personalities. In Texas, stem cells rejuvenate dying hearts. In China, clinics offer stem cells to patients suffering from everything from paralysis to brain trauma.Positioned at the cutting edge of science,