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Natural sleep cycles. A must see video!
| Posted on 2 March, 2015 at 10:05 |
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Write your post here. |
Sleep and Light
| Posted on 5 July, 2012 at 8:35 |
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 Exposure to sunlight is highly significant factor that affects sleep on many levels. It is not only how much light your are exposed to but also when you are exposed to it that counts. Have a look at this article from Prof Till Roenneberg. |