Sleep, Not Screens

While it's generally becoming understood that light-emitting screens can cause problems when it's time to go to sleep, we're just now beginning to realize the longer-term impact that may come when we take our screens to bed with us. The chronic suppression of melatonin has been linked to increased risk of various cancers, obesity & diabetes.

http://www.washingtonpost.com/news/to-your-health/wp/2014/12/22/ipads-tablets-smartphones-disrupt-good-sleep-study-finds/