Scientists believe that stem cell research could eventually lead to cures and treatments for a host of human disorders and disease¿ but where those stem cells come from is the subject of major controversy. Through objective overviews, primary sources, and full-color illustrations, this title examines Is Stem Cell Research Necessary? Is Stem Cell Research Ethical? Are Stem Cells the Answer to Prolonged Human Life? Can the Stem Cell Debate Be Resolved?