January 11, 1998 The Copy Shop Wrestling with ethics on
biotechnology's new frontier.  Cloning and Beyond in a Brave New
World. By Lee M. Silver. 315 pp. New York: Avon Books. $25.
Last October, just before Halloween, The Sunday Times of London
ran one of the best over-the-top horror stories of 1997. The
paper reported that a University of Bath biologist had created
in a laboratory dish living, wriggling tadpoles -- with no
heads! ''Headless frog opens way for human organ factory,'' The
Times headline declared. The idea was that platoons of headless
human clones could be created to provide a steady supply of
fresh, healthy livers, kidneys, hearts and lungs for transplant.
(Count on this to be discovered by agents Mulder and Scully on
''The X-Files'' before the season is out.)  The story drew a
quick reaction from Arthur Caplan, director of the Center for
Bioethics at the University of Pennsylvania, and J. Craig
Venter, head of the Institute for Genomic Research in Rockville,
Md. In a letter to the journal Sc