Circadian Rhythm

The whole universe is based on rhythms. Everything happens in circles, in spirals - John Hartford

Circadian Rhythm
Circadian Rhythm

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Your Body’s Witching Hours

Heart attacks often occur in the morning. Epileptic seizures peak in the late afternoon. Asthma attacks get worse and more deadly between 11 p.m. and 3 a.m.

Researchers are finding that circadian rhythms, which cycle every 24 hours or so, drive virtually every system in the human body, from circulation and cognition to metabolism, memory and mood. And they play a big role in determining when we are most vulnerable to disease.

Chronobiology—the study of these internal clock mechanisms—has exploded in recent years thanks in part to the discovery of specific genes, to which scientists have given names like Clock, Period and Cryptochrome. Those genes help keep our biological…

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 Your Body’s Witching Hours

Circadian rhythms help determine when we are most vulnerable to disease.


The B-Society is working towards making a flexible society, which can accommodate different types of families, ways of working and circadian rhythms.

Center for Circadian Biology

Fostering innovative research that reveals the mechanisms, general principles, and applications of biological rhythms in diverse organisms.

Circadian Sleep Disorders Network

Circadian Sleep Disorders Network is an independent nonprofit organization dedicated to improving the lives of people with chronic circadian rhythm disorders. We aim to increase awareness within the medical community and among the general public, to provide emotional support and practical ideas for people living with these disorders...

Journal of Circadian Rhythms

The Journal of Circadian Rhythms aims to include both basic and applied research at any level of biological organization (molecular, cellular, organic, organismal, and populational). Studies of daily rhythms in environmental factors that directly affect circadian rhythms are also pertinent to the journal's mission.

Society for Research on Biological Rhythms

The Society for Research on Biological Rhythms is an international society established in 1986 to promote the advancement and dissemination of basic and applied research in all aspects of biological rhythms, enhance the education and training of students and researchers in the field, and foster interdisciplinary communication through the organization of biennial meetings and informal gatherings.

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