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The central circadian clock resides in the hypothalamus in the brain, he added. It keeps in touch with the outside world by means of light signals from the eyes, and then synchronises numerous other peripheral clocks in tissues around the body such as the heart, liver and gut. ... It now appears that virtually all cells in the body have their own ticking circadian clock, including skin cells.

2008-01-28

 brain circadian time internal clock sleep
... researchers said they could not rule out the possibility that long-term use may raise the risk of cancer.

2008-01-21

 mobile phone sleep health wireless radiation insomnia
Couples should consider sleeping apart for the good of their health and relationship, say experts.

2009-09-09

 health sleep marriage bed relationship
When men spend the night with a bed mate their sleep is disturbed, whether they make love or not, and this impairs their mental ability the next day.

2006-07-20

 sleep psychology sex relationship
The brain may need sleep to process short-term memories, creating "space" for new facts to be learned...

2010-02-21

 sleep memory learning cognition brain
The dreams might reflect the brain's attempt to find associations for the memories that could make them more useful in the future...

2010-04-23

 memory brain learning dream sleep association search engine background
They said people regularly having such little sleep were 12% more likely to die over a 25-year period than those who got an "ideal" six to eight hours. They also found an association between sleeping for more than nine hours and early death, although that much sleep may merely be a marker of ill health...

2010-05-04

 sleep health death night
A gene that triggers plants to become dormant at night and controls flowering has been discovered by scientists.

2012-03-11

 genetics plant circadian rhythm sleep

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