Alchemy Revived [review of CLONES AND CLONES: FACTS AND FANTASIES ABOUT HUMAN CLONING, edited by Martha C. Nussbaum and Cass R. Sunstein; IMPROVING NATURE? THE SCIENCE AND ETHICS OF GENETIC ENGINEERING, by Michael Reiss and Roger Straughan; and THE BIOTECH CENTURY: HARNESSING THE GENE AND REMAKING THE WORLD, by Jeremy Rifkin]