What makes a person who they are This is one of the fundamental questions of human life. Scientists of the 21st century have made rapid advances in cloning and editing human DNA and cells even if their understanding of how human characteristics are shaped is still relatively new. In Cloning Humans readers will learn about three life-changing pieces of genetic technology from therapeutic cloning to embryonic gene editing. By exploring these innovations and how they work students will expand their learning of biology genetics and other STEM fields.