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A comment on The Napwell Knows When You Are Sleeping, Then Coaxes You Awake.

Re:The Napwell Knows When You Are Sleeping, Then Coaxes You ... by kumarski on Tuesday December 17, 2013 @06:56PM (#6924872)
I read somewhere a few months ago on HN that humans didn't start sleeping 8 hour cycles till the late 17th century.....

Wish I could find that article....

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Re:The Napwell Knows When You Are Sleeping, Then Coaxes You ... by al-xss on Tuesday December 17, 2013 @07:06PM (#6924915)
I think you are looking for this: http://www.bbc.co.uk/news/magazine-16964783
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Re:The Napwell Knows When You Are Sleeping, Then Coaxes You ... by kumarski on Wednesday December 25, 2013 @06:26PM (#6964686)
Thanks!
[ Parent | on HN ]