The after-hours mutants

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Every night owl you meet will tell you the same thing: there is something magical about those late night hours when the rest of the world is sleeping. It's your time, unscheduled and undisturbed, to spend as you wish. To some, this perspective may seem lazy and immature, a luxury afforded only to those who don't have real adult responsibilities. And this may be partially true - many would-be night owls have few opportunities to enjoy the later evening hours because of work, kids, and other demands. But new research suggests that even these non-practicing night owls may be hard-wired to want to stay up late. Though sleep preferences are due in part to non-biological factors like culture, and family environment, at least 50% of the variance seems to be driven by genes, specifically something called the "after-hours mutant" which appears to prolong the circadian rhythm. As a result, evening people may find the traditional work schedule a constant battle with the snooze button, regardless of how much sleep they get.
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