Now with full-color photographs and line illustrations, Stem Cell Research, Revised Edition discusses the different types of stem cells, how they are studied in the laboratory, and the diseases that may be treated with these cells. This edition has been extensively revised and expanded to include four new chapters that discuss the origin and evolution of ordinary cells, as well as a detailed discussion of human and animal stem cells, therapeutic cloning, and a new form of stem cell that is produced by reprogramming ordinary skin cells. Featuring up-to-date coverage on the medical applications of stem cell therapy, this resource examines the growing cost of developing these therapies and the important role that pharmaceutical companies play. Written in accessible and straightforward language, this helpful book offers readers a timely look at this controversial topic.