Clones are organisms that are genetically identical. Most clones are single-cell bacteria or protozoa that reproduce by making exact copies of themselves. But these are not the clones that are making headlines in Washington D.C. and around the world. What does it mean to clone an animal such as a sheep, a pig or a human being? Should we care? The answer is an emphatic “Yes!” Learn more about the complexity of the scientific and moral issues surrounding cloning at these five sites.