Journal of Biological Rhythms primarily offers papers 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. Research in circadian, seasonal, and other biological rhythms is interdisciplinary. Studies using a variety of genetic, biochemical, physiological, pharmacological, behavioral, epidemiological, clinico-pathological, and modeling approaches to understand the nature, mechanisms, and functions of biological rhythms in all species are welcome. Rhythms are placed within the context of the functional significance of these rhythms for the health and well-being of relevant organisms, including humans. Every other month, the Journal presents work at the leading edge of understanding the basic nature, mechanisms, and functions underlying the generation, entrainment, and expression of biological rhythms in plants, animals, and humans. Some of the important topics discussed include: Sleep-Wake Cycles Impact and Role of Rhythms in Health and Disease Rhythms and Depression Jet Lag and Shift Work Hormonal and Metabolic Rhythms Behavioral and Performance Rhythms Reproductive Cycles Photoperiodism, Seasonal Cycles, and Annual Cycles Plant Rhythms and Their Mechanisms Hibernation and Migration Cellular Clock Mechanisms Neuroanatomy and Neurobiology of Circadian Systems Melatonin and Pineal Gland Molecular Basis of Circadian Timing Identification of Genes Underlying Rhythmicity Control of Gene Expression by Clock Proteins Comparison of Rhythm Mechanisms among Life Forms Mechanisms of Photoreception and Photoentrainment Information Transfer from and among Clock Cells Mathematical Models of Circadian Oscillators This journal is a member of the Committee on Publication Ethics (COPE) Submit your manuscript today at https://mc.manuscriptcentral.com/jbrhythms .