The online version of this well-known periodical offers access to an archive of articles and the latest news, reviews, and scientific opinion. The News section covers the latest articles about science issues, while Hot Topics provides in-depth reports on the most exciting areas of science. The Last Word allows users to submit scientific questions, read answers sent in by other readers, or submit their own answers. Also included are interviews, book reviews, on-line conference reports, archives of back issues, and links to sites that deal with specific scientific disciplines.