MARGARET WARNER: Several countries in Europe ban the type of work done by the South Korean scientists. The U.S. has no federal law against cloning human embryos, but President Bush has outlawed it ...

There are different types of cloning. Of course cloning of animals, especially humans is the most controversial. It is called reproductive cloning.

Back when it was no more than a cheesy science-fiction plot device, human cloning seemed like something that would eventually be revealed to a horrified world full-blown and fully grown–a ...

Franco Furger, the executive director of the Human Biotechnology Governance Forum, which favors government regulation of cloning and other types of human genetic engineering, agreed.

CLONING FEAT Using a laser and a tiny needle, researchers suck DNA from a human egg, the first step of a newly revised process that created human embryonic stem cells for the first time. Courtesy ...