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Cloned babies. Conceptual computer artwork of identical cloned babies. Cloning exactly copies an organism by implanting its genetic material or DNA (deoxyribonucleic acid) into eggs from the same species. It is theoretically possible to produce unlimited numbers of identical copies of a person, by placing their DNA into human eggs that have had their genetic material removed. (KEYSTONE/SCIENCE PHOTO LIBRARY/VICTOR DE SCHWANBERG)