faqs

• Stem cells have a great but still uncertain medical potential. They offer scientific insights into how animals grow and develop and how some diseases might be treated. Here we define them, describe how they are studied, and sketch their potential and the controversies that surround them. We thank Stanford's Christopher Scott, Harvard's Willy Lensch, and University of Southern California's Martin Pera for their thoughtful comments and suggestions on these FAQs. Stem cell science is a fast-changing field, and we will do our best to keep this section current. Please email your feedback to theniche@nature.com.
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