BioEssays is a review-and-discussion journal publishing news, reviews and commentaries in contemporary biology that have a molecular, genetic, cellular, or physiological dimension. The journal is divided into two main sections, Reviews and Features. The Reviews consists of both short articles highlighting issues of interest and broader review articles that have a wider scope and attempt to give rounded pictures of particular subject areas. The Features focus on subjects of special interest, including novel hypotheses, discussions of difficult issues in biology, presentations of molecular or cellular model systems, specific advances in genomics, first-hand accounts of discoveries of importance, or subjects in applied biological science, particularly medicine. What's New Articles, commentaries, meeting reports, book reviews, and a page of extracts of stories in the news complete the coverage provided by BioEssays. The journal's insightful analysis makes it essential reading for professional researchers, as well as an invaluable tool for classroom instruction.