Humans evolved to respond to darkness by producing melatonin, the hormone that regulates the sleep cycle. But our light-sensitive pineal gland near the center of the brain responds to blue light by suppressing melatonin, causing us to wake up, the Washington Post reports. When we see too much blue light in the late evening, it delays or disrupts the melatonin rush. In other words, my iPad can keep me up even after I turn it off. But just as technology can cause this problem, it offers a solution as well. Enter F.lux, a desktop application that adjusts a computer screen's...

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About the Author:

Laura Ascione

Laura Ascione is the Managing Editor, Content Services at eSchool Media. She is a graduate of the University of Maryland's prestigious Philip Merrill College of Journalism. When she isn't wrangling her two children, Laura enjoys running, photography, home improvement, and rooting for the Terps. Find Laura on Twitter: @eSN_Laura http://twitter.com/eSN_Laura