Stem cell research, genetically modified crops, animals developed with personalized human organs for transplantation, and other previously inconceivable biotech applications could increase the quality of all human lives and maximize the health of the biosphere. But ironically, as the science becomes more precise and transparent, it also becomes more contentious. In Challenging Nature, Silver argues that although they seem to have little in common, Christian fundamentalists opposed to embryo research and New Age organic food devotees are both driven by a deeply rooted fear that...

Could a child have two genetic mothers? Will parents someday soon be able to choose not only the physical characteristics of their children-to-be, but their personalities and talents as well? Will genetic enhancement ultimately lead to a split in the human species?

In this brilliant, provocative, and necessary book, Lee M. Silver takes a cautiously optimistic look at the scientific advances that will allow us to engineer life in ways that were unimaginable just a few short years ago--indeed, in ways that go far beyond cloning. In clear, engaging, and accessible prose, Silver...