The article says increase in sleep is surprising, but is it? People consumed far more data (from the internet) in 2014 compared to 2004. One of the known purposes of sleep is to consolidate memories from the day and to convert short term memory to long term memory[1]. More data implies more memory, which implies more time to consolidate that memory. This implies increase of sleep time.<p>[1] <a href="http:&#x2F;&#x2F;www.bbc.com&#x2F;future&#x2F;story&#x2F;20120228-why-do-we-need-to-sleep" rel="nofollow">http:&#x2F;&#x2F;www.bbc.com&#x2F;future&#x2F;story&#x2F;20120228-why-do-we-need-to-s...</a>