A new generation of science writers is tackling issues where the repercussions of not communicating responsibly with the public have enormous policy and research implications. Meanwhile, it is the best of times and worst of times for science writing on the Web. An expanding cadre of fiercely independent, talented, and often very young science bloggers is coming to grips with a new dilemma: Just how do they fit into the changing landscape of science journalism, and to what degree are they willing to incorporate some old media standards into their new media work?