Circadian Rhythm and Your Brain’s Clock

Why do we sleep at night instead of during the day? In this episode of SciShow Hank talks about circadian rhythms, how they work, and how they regulate different processes in our bodies.
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Sources:
http://www.ncbi.nlm.nih.gov/pubmed/18419318
http://www.livescience.com/13123-circadian-rhythms-obesity-diabetes-nih.html
http://www.sleepfoundation.org/article/sleep-topics/sleep-drive-and-your-body-clock
http://www.aasmnet.org/resources/factsheets/crsd.pdf
http://www.helpguide.org/harvard/sleep_cycles_body_clock.htm
http://www.princeton.edu/~ota/disk1/1991/9108/910805.PDF
http://news.uci.edu/press-releases/circadian-rhythms-control-bodys-response-to-intestinal-infections-uci-led-study-finds/
http://blogs.nature.com/news/2012/03/gaining-control-of-our-circadian-rhythms.html
http://news.yale.edu/2013/06/17/rhythm-everything
http://online.wsj.com/news/articles/SB10000872396390444180004578018294057070544

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