Columbia physicist Brian Greene, whose latest book is The Fabric of the Cosmos: Space, Time, and the Texture of Reality . Also: Feds ingnoring safety violations in Washington State?; Top Scientists, including 20 Nobel laureates, accuse Bush Administration of egregious violations of basic scientific norms; Biotechnologists concerned about possible U.S. brain-drain to countries that allow stem Cell research; Astronomers find fingerprint of a black hole swallowing an entire star; Scientists find weak electromagnetic fields can damage DNA in brain tissue; Can gene therapy be abused?