Journal of Biological Rhythms (JBR) publishes original reports in English describing original research into all aspects of biological rhythms. Emphasis is placed on circadian and seasonal rhythms, but papers on other rhythms are also published. In addition to original research papers, the Journal publishes reviews, commentaries, editorials, letters, and other items of interest related to biological rhythms. Authors use genetic, biochemical, physiological behavioral, and modeling approaches to understand the nature, mechanisms, and functions of biological rhythms in plants and animals. They also study human rhythms in experimental, clinical, and real world settings. Preliminary or incomplete studies will not be considered. Research reported in the journal must meet the highest standards of experimental design and data analysis. Opinion papers and reviews of significant timely issues will also be considered.