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? and Can the Stem Cell Debate Be Resolved?