For the past five years, the prospect of human cloning has been the subject of much public attention and sharp moral debate. Several mammalian species have been cloned; the first cloned human embryos ...

When Dolly the sheep—the first cloned mammal—was born 30 years ago, she became one of the most famous animals in science history. Her arrival sparked predictions of a sci-fi future filled with cloned ...

Human cloning is the creation of a genetically identical copy (or clone) of a human. The term is generally used to refer to artificial human cloning, which is the reproduction of human cells and ...