A brief introduction to stem cells, how they grow and develop:
A not-so-brief, more informative discussion of stem cells:
Adult stem cells vs. embryonic:
Another video on stem cells and how they work: http://www.kqed.org/quest/television/view/326?gclid=CIS7ubu58poCFSMSagodLU17dg
Politics:Barack Obama's stance on stem cells:
