Turns out, all our stem cell lines are contaminated with pig molecules. Now what do we do?

All the more reason to harvest them from dead babies, right? Not so fast, says Paul R. Sanberg, director of the Center of Excellence for Aging and Brain Repair at the University of South Florida College of Medicine

"This is yet another reason to look at non-embryonic [adult] stem cell sources, such as umbilical cord blood, bone marrow, fat cells, other types," he corrects.