| American Association of Medical Chronobiology and Chronotherapeutics: Provides an organizational framework for medical scientists, including academic and practicing physicians, interested in chronobiological phenomena. |
| American Society for Gravitational and Space Biology -- Desert Beetle Circadian Rhythm Study Begins on Mir: When Space Shuttle Atlantis docked with Mir on May 15, it delivered 64 desert beetles for a circadian rhythm study to understand how the space flight environment changes the body's internal clock. |
| Center for Biological Timing Home Page: The National Science Foundation Center for Biological Timing. Tutorials and original papers on biological timing. |
| Circadian Sleep Disorders Association: Support and providing information to those affected by circadian sleep disorders such as Delayed Sleep Phase Syndrome. Includes links, FAQs, message board and a mailing list. |
| Delayed Sleep Phase Syndrome: Comprehensive site with symptoms, causes, treatments, and links to further information on DSPS and circadian rhythms. |
| Dr. Postolache - The Institute for Sports Chronobiology: Consulting on optimizing sports performance via optimizing sleep-wake schedules and biological rhythms. |
| Light Sets the Molecular Controls of Circadian Rhythm: Work conducted at the Rockefeller University indicates that light can reset the biological clock. |
| Mental Health Net - Circadian Rhythm Sleep Disorder Symptoms: General symptoms of circadian rhythm sleep disorder. |
| Scientists Find Eye Pigment Controls Circadian Rhythm: A brief report on an eye pigment, cryptochrome, which appears to control mammals' circadian rhythms. |
| Society for Light Treatment and Biological Rhythms: A not-for-profit international organization founded in 1988 which aims to foster research, professional development and clinical applications in the fields of light therapy and biological rhythms. |
| The Brain, Circadian Rhythms, and Clock Genes: British Medical Journal Article on circadian rhythms (1998). A clinical review. |
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