read more: http://arstechnica.com/science/2014/12/ ... -schedule/E-readers and tablets really do seem to alter your sleep schedule
In less than a decade, reading has shifted from the medium it dominated for centuries—paper—to screens of various sorts. The change in habit has been accompanied by concerns over whether this could be influencing sleep. Exposure to light biased toward blue wavelengths, such as that produced by the screens of tablets, has been shown to alter the circadian rhythms that set the body's clock.
Is the information age unleashing the Panopticon or unlocking the Doors of Perception?
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