Abstract
1 Thirty years later, Ian Wilmut and colleagues of the Roslin Institute of Edinburgh, Scotland, succeeded in cloning sheep from fetal and embryonic cells,and in February of 1997, they made the sensational announcement that they had obtained a sheep, which they named Dolly, from a clone obtained from the cell of an adult female sheep. In January of 1998, it was publicly announced that two calves, produced by cloning, were born on a Texas ranch, and that others were soon to be born. In the case of Dolly, because the animal cloned was both an adult and a mammal (thus much closer physiologically to humans than the frog, an amphibian), this announcement created a great stir and controversy in scientific circles and among the public. There were immediate demands in the U.S. and in many other countries to prohibit such attempts. Presently there are laws in the United Kingdom and some other countries against the cloning of humans, but the U.S. has no such laws. President Clinton immediately issued orders prohibiting the use of federal funds to support research on human cloning and bills have been introduced in the U.S. Congress to prohibit the cloning of humans.